1 00:00:00,000 --> 00:00:03,060 Okay, so get this, we're going to Io today, Jupiter's moon. 2 00:00:03,060 --> 00:00:04,200 Oh wow. 3 00:00:04,200 --> 00:00:08,000 Yeah, and you better pack some serious sunscreen 4 00:00:08,000 --> 00:00:10,880 because this place is a volcanic inferno. 5 00:00:10,880 --> 00:00:11,960 You're not kidding, are you? 6 00:00:11,960 --> 00:00:13,880 Nope, it's like constantly erupting 7 00:00:13,880 --> 00:00:15,660 with these massive volcanoes, 8 00:00:15,660 --> 00:00:18,480 practically spitting lava into space. 9 00:00:18,480 --> 00:00:19,720 Sounds intense. 10 00:00:19,720 --> 00:00:22,120 It is, and we're gonna figure out why. 11 00:00:22,120 --> 00:00:24,720 Welcome to Cosmos in a Pod Space and Astronomy series. 12 00:00:24,720 --> 00:00:25,760 All right, I'm ready to dive in, 13 00:00:25,760 --> 00:00:27,320 and Io is just one of those places 14 00:00:27,320 --> 00:00:29,520 that makes you just completely rethink 15 00:00:29,520 --> 00:00:31,760 what's even possible out there in the universe. 16 00:00:31,760 --> 00:00:33,640 Yeah, it really makes you wonder. 17 00:00:33,640 --> 00:00:36,200 So before we get into all the fiery details, 18 00:00:36,200 --> 00:00:37,540 can we get a quick snapshot? 19 00:00:37,540 --> 00:00:39,640 What is Io, how big are we talking? 20 00:00:39,640 --> 00:00:43,560 So think of our own moon, but just a bit bigger. 21 00:00:43,560 --> 00:00:45,440 That's Io, it's not the largest moon out there, 22 00:00:45,440 --> 00:00:47,520 but it's definitely got the most personality. 23 00:00:47,520 --> 00:00:49,640 Okay, so I'm picturing a slightly larger moon, 24 00:00:49,640 --> 00:00:52,600 but instead of peaceful craters, 25 00:00:52,600 --> 00:00:54,280 it's just constant fireworks. 26 00:00:54,280 --> 00:00:56,760 What is causing all this volcanic mayhem? 27 00:00:56,760 --> 00:00:59,080 It's a phenomenon called tidal heating, 28 00:00:59,080 --> 00:01:00,880 and it's basically a cosmic tug of war. 29 00:01:00,880 --> 00:01:04,400 So Io gets caught between this gravitational pull 30 00:01:04,400 --> 00:01:06,080 of Jupiter on one side, 31 00:01:06,080 --> 00:01:09,440 and then two of its other moons on the other side, 32 00:01:09,440 --> 00:01:11,520 Europa and Ganymede. 33 00:01:11,520 --> 00:01:13,360 So it's like being pulled in three different directions. 34 00:01:13,360 --> 00:01:17,340 Exactly, imagine being constantly squeezed and stretched, 35 00:01:17,340 --> 00:01:18,280 like a stress ball. 36 00:01:18,280 --> 00:01:19,920 Oh man, that sounds uncomfortable. 37 00:01:19,920 --> 00:01:21,920 That's Io's daily life. 38 00:01:21,920 --> 00:01:23,200 Oh my goodness. 39 00:01:23,200 --> 00:01:24,980 So all this squeezing and stretching, 40 00:01:24,980 --> 00:01:27,200 it's making Io's insides super hot, right? 41 00:01:27,200 --> 00:01:30,120 Exactly, it's like constantly kneading dough. 42 00:01:30,120 --> 00:01:33,320 All that friction is gonna keep Io's interior molten, 43 00:01:33,320 --> 00:01:36,000 and all that molten rock needs to escape somewhere. 44 00:01:36,000 --> 00:01:36,840 Oh, I see. 45 00:01:36,840 --> 00:01:39,480 Which is why we see these incredible eruptions. 46 00:01:39,480 --> 00:01:41,880 Okay, so how do Io's volcanoes 47 00:01:41,880 --> 00:01:43,880 compare to what we see on Earth? 48 00:01:43,880 --> 00:01:45,880 Are we talking like Mount Vesuvius 49 00:01:45,880 --> 00:01:48,120 or something way more intense? 50 00:01:48,120 --> 00:01:48,960 Way more intense. 51 00:01:48,960 --> 00:01:51,400 We're talking hundreds of active volcanoes. 52 00:01:51,400 --> 00:01:52,240 Hundreds. 53 00:01:52,240 --> 00:01:53,680 Yeah, some spewing lava fountains 54 00:01:53,680 --> 00:01:55,360 that are hundreds of kilometers high. 55 00:01:55,360 --> 00:01:56,200 Oh my goodness. 56 00:01:56,200 --> 00:01:58,880 There's one called Pele that's especially famous. 57 00:01:58,880 --> 00:01:59,720 Pele, okay. 58 00:01:59,720 --> 00:02:01,960 Yeah, for putting on these just spectacular shows. 59 00:02:01,960 --> 00:02:03,680 So what's the lava like on Io? 60 00:02:03,680 --> 00:02:05,120 Is it the same stuff we have here? 61 00:02:05,120 --> 00:02:08,080 It is lava, but it's not like the kind we're used to. 62 00:02:08,080 --> 00:02:08,920 Okay. 63 00:02:08,920 --> 00:02:12,440 Io's lava is made of silicate rock, just like on Earth, 64 00:02:12,440 --> 00:02:13,640 but it's much hotter. 65 00:02:13,640 --> 00:02:16,520 We're talking temperatures that would just melt most metals. 66 00:02:16,520 --> 00:02:17,360 Wow. 67 00:02:17,360 --> 00:02:19,960 And because it's so hot, it actually flows much faster. 68 00:02:19,960 --> 00:02:20,800 Okay. 69 00:02:20,800 --> 00:02:22,920 And it creates these crazy alien landscapes. 70 00:02:22,920 --> 00:02:25,400 So not your average Hawaiian lava flow then? 71 00:02:25,400 --> 00:02:26,320 Definitely not. 72 00:02:26,320 --> 00:02:29,040 So with all this molten rock, like spewing everywhere, 73 00:02:29,040 --> 00:02:31,440 what does Io's surface actually look like? 74 00:02:31,440 --> 00:02:34,600 Okay, so imagine a painter's palette gone wild. 75 00:02:34,600 --> 00:02:35,440 Right. 76 00:02:35,440 --> 00:02:36,480 Seriously. 77 00:02:36,480 --> 00:02:39,200 Io's surface is this constantly changing mix 78 00:02:39,200 --> 00:02:41,880 of yellows and oranges, reds and whites. 79 00:02:41,880 --> 00:02:42,720 Like a rainbow? 80 00:02:42,720 --> 00:02:44,880 Yeah, and all those colors actually come 81 00:02:44,880 --> 00:02:47,000 from sulfur and sulfur dioxide. 82 00:02:47,000 --> 00:02:47,840 Oh, interesting. 83 00:02:47,840 --> 00:02:49,640 Which are constantly being deposited 84 00:02:49,640 --> 00:02:51,360 by the volcanic eruptions. 85 00:02:51,360 --> 00:02:52,560 No craters here. 86 00:02:52,560 --> 00:02:55,040 Io's surface is way too active for those to form. 87 00:02:55,040 --> 00:02:55,880 Wow. 88 00:02:55,880 --> 00:02:58,000 It's constantly being reshaped by these lava flows 89 00:02:58,000 --> 00:03:00,720 and volcanic plumes and sulfur deposits. 90 00:03:00,720 --> 00:03:04,400 Okay, so we've got this super hot, constantly erupting moon. 91 00:03:04,400 --> 00:03:06,280 But what about an atmosphere? 92 00:03:06,280 --> 00:03:08,360 Can anything survive in that kind of environment? 93 00:03:08,360 --> 00:03:10,160 Well, Io does have an atmosphere. 94 00:03:10,160 --> 00:03:11,000 Okay. 95 00:03:11,000 --> 00:03:14,480 But it's incredibly thin and it's toxic to us earthlings. 96 00:03:14,480 --> 00:03:15,400 Yeah, right. 97 00:03:15,400 --> 00:03:17,920 It's mostly made up of sulfur dioxide. 98 00:03:17,920 --> 00:03:18,760 Okay. 99 00:03:18,760 --> 00:03:21,320 Which, you guessed it, is constantly being replenished 100 00:03:21,320 --> 00:03:22,680 by those volcanic eruptions. 101 00:03:22,680 --> 00:03:23,520 Oh, wow. 102 00:03:23,520 --> 00:03:25,640 Every time it erupts, it's adding 103 00:03:25,640 --> 00:03:27,040 to its poisonous atmosphere. 104 00:03:27,040 --> 00:03:28,920 Yeah, basically. 105 00:03:28,920 --> 00:03:30,080 Not very hospitable. 106 00:03:30,080 --> 00:03:31,520 No, not at all. 107 00:03:31,520 --> 00:03:34,080 But here's where things get even more interesting. 108 00:03:34,960 --> 00:03:38,920 All this volcanic activity isn't just affecting Io itself. 109 00:03:38,920 --> 00:03:41,080 It's actually having a huge impact on Jupiter. 110 00:03:41,080 --> 00:03:41,920 That's right. 111 00:03:41,920 --> 00:03:42,740 Hold on. 112 00:03:42,740 --> 00:03:44,680 This tiny moon is messing with the biggest planet 113 00:03:44,680 --> 00:03:45,560 in our solar system. 114 00:03:45,560 --> 00:03:46,840 How is that even possible? 115 00:03:46,840 --> 00:03:50,160 So you see, all those eruptions are spewing out tons 116 00:03:50,160 --> 00:03:53,000 of particles that get caught up in Jupiter's magnetic field, 117 00:03:53,000 --> 00:03:54,720 which is incredibly powerful. 118 00:03:54,720 --> 00:03:56,160 And guess what that creates? 119 00:03:56,160 --> 00:03:57,160 I'm on the edge of my seat. 120 00:03:57,160 --> 00:03:58,000 What does it create? 121 00:03:58,000 --> 00:03:59,760 It creates this giant ring 122 00:03:59,760 --> 00:04:01,720 of charged particles around Jupiter. 123 00:04:01,720 --> 00:04:03,520 It's called a plasma torus. 124 00:04:03,520 --> 00:04:04,360 Oh, wow. 125 00:04:04,360 --> 00:04:05,760 It's like a giant glowing donut. 126 00:04:05,760 --> 00:04:06,600 The glowing donut? 127 00:04:06,600 --> 00:04:09,800 It's one of the most spectacular sites in our solar system. 128 00:04:09,800 --> 00:04:13,280 A glowing donut of charged particles Io 129 00:04:13,280 --> 00:04:16,200 is way more powerful than its size suggests. 130 00:04:16,200 --> 00:04:17,520 Yeah, it really is. 131 00:04:17,520 --> 00:04:19,840 It's a testament to how even small objects 132 00:04:19,840 --> 00:04:22,160 can have a big impact in the universe. 133 00:04:22,160 --> 00:04:23,440 I need a moment to process 134 00:04:23,440 --> 00:04:26,040 this glowing space donut situation. 135 00:04:26,040 --> 00:04:26,880 Uh-huh. 136 00:04:26,880 --> 00:04:27,720 Ah. 137 00:04:27,720 --> 00:04:31,080 But before I do, how did we figure all this out about Io? 138 00:04:31,080 --> 00:04:34,480 I mean, did Galileo just look up and see volcanoes erupting? 139 00:04:34,480 --> 00:04:35,560 That would have been incredible. 140 00:04:35,560 --> 00:04:36,400 Right. 141 00:04:36,400 --> 00:04:37,400 But no. 142 00:04:37,400 --> 00:04:40,080 When Galileo first spotted Io with his telescope 143 00:04:40,080 --> 00:04:42,800 back in 1610, it just looked like a bright dot. 144 00:04:42,800 --> 00:04:45,720 He had no idea what a wild place it really was. 145 00:04:45,720 --> 00:04:47,080 So when did we start realizing 146 00:04:47,080 --> 00:04:49,440 that Io was a volcanic wonderland? 147 00:04:49,440 --> 00:04:52,360 It wasn't until the Voyager 1 and 2 missions 148 00:04:52,360 --> 00:04:56,600 in the late 1970s that we got our first real glimpse 149 00:04:56,600 --> 00:04:57,920 of its volcanic activity. 150 00:04:57,920 --> 00:04:59,480 I can only imagine the shock. 151 00:04:59,480 --> 00:05:00,640 Must have been like a pretty big deal 152 00:05:00,640 --> 00:05:01,760 for the scientific community. 153 00:05:01,760 --> 00:05:03,800 It was a revolutionary discovery. 154 00:05:03,800 --> 00:05:05,680 It was the first place beyond Earth 155 00:05:05,680 --> 00:05:07,920 where we observed active volcanoes. 156 00:05:07,920 --> 00:05:08,760 Wow. 157 00:05:08,760 --> 00:05:10,400 And it completely changed our understanding 158 00:05:10,400 --> 00:05:11,920 of what was even possible out there. 159 00:05:11,920 --> 00:05:13,760 Okay, so Voyager gives us a sneak peek, 160 00:05:13,760 --> 00:05:15,560 but I'm guessing the story doesn't end there. 161 00:05:15,560 --> 00:05:16,400 What happened next? 162 00:05:16,400 --> 00:05:18,040 Well, we needed a closer look, right? 163 00:05:18,040 --> 00:05:22,640 So in the 1990s, NASA sent the Galileo spacecraft 164 00:05:22,640 --> 00:05:26,360 to orbit Jupiter and get a really good look at its moons. 165 00:05:26,360 --> 00:05:28,280 All right, and what did Galileo teach us 166 00:05:28,280 --> 00:05:29,840 about this fiery moon? 167 00:05:29,840 --> 00:05:31,880 Oh, it was a game changer. 168 00:05:31,880 --> 00:05:36,440 Galileo gave us high resolution images of Io's surface. 169 00:05:36,440 --> 00:05:37,280 Okay. 170 00:05:37,280 --> 00:05:38,400 Mapped its volcanoes. 171 00:05:38,400 --> 00:05:39,240 Wow. 172 00:05:39,240 --> 00:05:41,760 And even measured the composition of its volcanic plumes. 173 00:05:41,760 --> 00:05:44,320 So thanks to Galileo, we started to see Io 174 00:05:44,320 --> 00:05:46,800 and all its fiery glory craters and all. 175 00:05:46,800 --> 00:05:48,920 Actually, no craters, remember Io's surface 176 00:05:48,920 --> 00:05:51,280 is constantly being reshaped by the volcanic activity. 177 00:05:51,280 --> 00:05:53,000 That's right, I keep forgetting. 178 00:05:53,000 --> 00:05:54,240 It's way too dynamic. 179 00:05:54,240 --> 00:05:55,080 It is. 180 00:05:55,080 --> 00:05:57,600 For impact craters to stick around very long. 181 00:05:57,600 --> 00:05:59,080 So we have Voyager's first look, 182 00:05:59,080 --> 00:06:01,400 then Galileo providing incredible detail. 183 00:06:01,400 --> 00:06:03,280 Did any other missions visit Io? 184 00:06:03,280 --> 00:06:04,200 We didn't stop there. 185 00:06:04,200 --> 00:06:06,880 The New Horizons spacecraft on its way to Pluto. 186 00:06:06,880 --> 00:06:07,720 Oh, right. 187 00:06:07,720 --> 00:06:09,400 Actually swung by Jupiter 188 00:06:09,400 --> 00:06:11,160 and captured some stunning images 189 00:06:11,160 --> 00:06:14,200 of Io's volcanic plumes back in 2007. 190 00:06:14,200 --> 00:06:15,040 Nice. 191 00:06:15,040 --> 00:06:17,040 But even today, the Juno spacecraft, 192 00:06:17,040 --> 00:06:18,400 which is orbiting Jupiter. 193 00:06:18,400 --> 00:06:22,040 Is collecting valuable data about Io's magnetic field 194 00:06:22,040 --> 00:06:24,640 and its interaction with the giant planet. 195 00:06:24,640 --> 00:06:25,600 Wow. 196 00:06:25,600 --> 00:06:29,240 So we've gone from this tiny dot in Galileo's telescope 197 00:06:29,240 --> 00:06:33,640 to having multiple spacecraft studying this crazy moon. 198 00:06:33,640 --> 00:06:36,640 It's incredible how far we've come in just a few centuries. 199 00:06:36,640 --> 00:06:39,160 It's a real testament to human curiosity. 200 00:06:39,160 --> 00:06:41,920 We just keep pushing the boundaries of what we know. 201 00:06:41,920 --> 00:06:44,920 And Io is just one of those places that keeps on giving. 202 00:06:44,920 --> 00:06:46,320 But even with all we've learned, 203 00:06:46,320 --> 00:06:48,360 I'm guessing there are still mysteries about Io 204 00:06:48,360 --> 00:06:50,520 that have scientists scratching their heads. 205 00:06:50,520 --> 00:06:51,920 Wow, absolutely. 206 00:06:51,920 --> 00:06:53,840 We've only just scratched the surface, so to speak. 207 00:06:53,840 --> 00:06:54,680 Okay. 208 00:06:54,680 --> 00:06:56,000 There's so much more we wanna know 209 00:06:56,000 --> 00:06:57,760 about this intriguing moon. 210 00:06:57,760 --> 00:06:58,840 Like what? 211 00:06:58,840 --> 00:07:00,680 Give me some juicy Io mysteries 212 00:07:00,680 --> 00:07:03,160 that are keeping scientists up at night. 213 00:07:03,160 --> 00:07:05,160 Well, for one, we're still not entirely sure 214 00:07:05,160 --> 00:07:08,440 about the exact composition of Io's mantle. 215 00:07:08,440 --> 00:07:10,440 What's down there deep beneath the surface 216 00:07:10,440 --> 00:07:12,320 that's fueling all this volcanic activity 217 00:07:12,320 --> 00:07:13,880 for billions of years. 218 00:07:13,880 --> 00:07:14,720 Yeah. 219 00:07:14,720 --> 00:07:16,200 A puzzle we're still trying to solve. 220 00:07:16,200 --> 00:07:17,440 It's like knowing there's a fire, 221 00:07:17,440 --> 00:07:19,280 but not being sure what's burning right. 222 00:07:19,280 --> 00:07:20,280 Exactly. 223 00:07:20,280 --> 00:07:22,880 And then there's the question of volcanic variability. 224 00:07:22,880 --> 00:07:26,200 Why are some of Io's volcanoes more active than others? 225 00:07:26,200 --> 00:07:29,040 What triggers these massive eruptions? 226 00:07:29,040 --> 00:07:31,840 There's a whole lot going on beneath Io's surface 227 00:07:31,840 --> 00:07:33,680 that we just don't fully understand. 228 00:07:33,680 --> 00:07:38,200 It sounds like Io is this giant volcanic puzzle box, 229 00:07:38,200 --> 00:07:40,480 and we're just starting to figure out how to open it. 230 00:07:40,480 --> 00:07:41,760 That's a great way to put it. 231 00:07:41,760 --> 00:07:43,600 And that's what makes it so fascinating. 232 00:07:43,600 --> 00:07:45,320 Io keeps us guessing, 233 00:07:45,320 --> 00:07:47,440 and that's what drives us to keep exploring. 234 00:07:47,440 --> 00:07:51,080 I can't wait to uncover more of Io's secrets. 235 00:07:51,080 --> 00:07:53,000 But first, I think we need to take a little break 236 00:07:53,000 --> 00:07:54,720 to let all this information sink in. 237 00:07:54,720 --> 00:07:55,560 Let's do that. 238 00:07:55,560 --> 00:07:56,920 I'm sure you have plenty more questions for me 239 00:07:56,920 --> 00:07:58,320 when we come back. 240 00:07:58,320 --> 00:07:59,960 So before the break, we were talking about 241 00:07:59,960 --> 00:08:01,800 how this tiny moon, Io, 242 00:08:01,800 --> 00:08:04,520 is actually having a huge impact on Jupiter itself. 243 00:08:04,520 --> 00:08:05,360 Right. 244 00:08:05,360 --> 00:08:07,800 That giant glowing space donut you mentioned, 245 00:08:07,800 --> 00:08:09,520 the Plasmatorius. 246 00:08:09,520 --> 00:08:11,240 It's mind-boggling to think that a moon 247 00:08:11,240 --> 00:08:13,480 could create something that massive around a planet. 248 00:08:13,480 --> 00:08:14,320 It really is. 249 00:08:14,320 --> 00:08:17,760 And it all comes down to Io's incredible volcanic activity. 250 00:08:17,760 --> 00:08:18,960 So all those eruptions, 251 00:08:18,960 --> 00:08:21,680 they're skewing out tons of these charged particles, 252 00:08:21,680 --> 00:08:24,240 and they get swept up in Jupiter's magnetic field, 253 00:08:24,240 --> 00:08:25,960 which is incredibly powerful. 254 00:08:25,960 --> 00:08:28,920 So Jupiter's magnetic field is basically acting 255 00:08:28,920 --> 00:08:31,440 like this giant cosmic vacuum cleaner, 256 00:08:32,280 --> 00:08:34,840 sucking up all those particles from Io. 257 00:08:34,840 --> 00:08:36,480 That's a great analogy. 258 00:08:36,480 --> 00:08:39,680 And as those particles get trapped in the magnetic field, 259 00:08:39,680 --> 00:08:43,280 they form this ring, this torus, around Jupiter. 260 00:08:43,280 --> 00:08:47,160 And it's constantly being fed by Io's volcanic plumes. 261 00:08:47,160 --> 00:08:48,000 Oh, wow. 262 00:08:48,000 --> 00:08:49,520 So it's a very dynamic structure. 263 00:08:49,520 --> 00:08:51,720 So it's like this never-ending cosmic fountain 264 00:08:51,720 --> 00:08:53,960 with Io providing the water, 265 00:08:53,960 --> 00:08:54,800 I did. 266 00:08:54,800 --> 00:08:56,520 And then Jupiter's magnetic field shaping the flow. 267 00:08:56,520 --> 00:08:57,360 Exactly. 268 00:08:57,360 --> 00:08:59,000 And it's not just a pretty sight either. 269 00:08:59,000 --> 00:09:01,720 This Plasmatorius actually has a significant impact 270 00:09:01,720 --> 00:09:03,480 on Jupiter's magnetic field. 271 00:09:03,480 --> 00:09:05,360 It distorts it and stretches it 272 00:09:05,360 --> 00:09:07,000 in some pretty fascinating ways. 273 00:09:07,000 --> 00:09:10,000 So Io's basically giving Jupiter a magnetic makeover. 274 00:09:11,000 --> 00:09:12,320 You could say that. 275 00:09:12,320 --> 00:09:13,640 What kind of effects does that have? 276 00:09:13,640 --> 00:09:15,440 Well, one of the most noticeable effects 277 00:09:15,440 --> 00:09:17,120 is on Jupiter's auroras. 278 00:09:17,120 --> 00:09:18,680 You know, those incredible light shows 279 00:09:18,680 --> 00:09:20,040 we see in your Jupiter's poles. 280 00:09:20,040 --> 00:09:21,920 Yeah, they're like the Northern Lights on steroids. 281 00:09:21,920 --> 00:09:22,760 Exactly. 282 00:09:22,760 --> 00:09:24,520 So Io's actually contributing to those. 283 00:09:24,520 --> 00:09:26,240 It's a key player. 284 00:09:26,240 --> 00:09:28,920 The particles from Io's Plasmatorius, 285 00:09:28,920 --> 00:09:30,880 they interact with Jupiter's atmosphere, 286 00:09:30,880 --> 00:09:34,240 and that creates those stunning auroral displays. 287 00:09:34,240 --> 00:09:37,000 So Io's not just a volcanic moon, 288 00:09:37,000 --> 00:09:38,880 it's like a cosmic artist too. 289 00:09:38,880 --> 00:09:39,880 That's one way to put it. 290 00:09:39,880 --> 00:09:42,560 But its influence doesn't stop there, right? 291 00:09:42,560 --> 00:09:44,600 You mentioned something before about Io 292 00:09:44,600 --> 00:09:46,520 affecting its neighboring moon, Europa. 293 00:09:46,520 --> 00:09:47,360 That's right. 294 00:09:47,360 --> 00:09:50,400 Remember Io is caught in this gravitational tug of war 295 00:09:50,400 --> 00:09:53,000 with Jupiter and its other moons. 296 00:09:53,000 --> 00:09:55,720 And that tug of war actually has some interesting effects 297 00:09:55,720 --> 00:09:59,880 on Europa, which is thought to have a vast liquid ocean 298 00:09:59,880 --> 00:10:01,360 beneath its icy surface. 299 00:10:01,360 --> 00:10:03,440 Wait, a liquid ocean? 300 00:10:03,440 --> 00:10:04,440 Under all that ice? 301 00:10:04,440 --> 00:10:06,800 How is that even possible so far from the sun? 302 00:10:06,800 --> 00:10:08,680 It's thanks to those same tidal forces 303 00:10:08,680 --> 00:10:10,840 that cause Io's volcanic activity. 304 00:10:10,840 --> 00:10:13,760 So the gravitational pull from Jupiter and its moons, 305 00:10:13,760 --> 00:10:15,720 it stretches and squeezes Europa, 306 00:10:15,720 --> 00:10:17,720 and that generates heat inside. 307 00:10:17,720 --> 00:10:20,440 And that heat is what keeps the ocean liquid, 308 00:10:20,440 --> 00:10:22,040 even though it's so far from the sun. 309 00:10:22,040 --> 00:10:25,240 So in a way, Io is responsible for keeping Europa's ocean 310 00:10:25,240 --> 00:10:27,560 from freezing solid. 311 00:10:27,560 --> 00:10:28,400 You could say that. 312 00:10:28,400 --> 00:10:29,240 That's incredible. 313 00:10:29,240 --> 00:10:30,060 It really is. 314 00:10:30,060 --> 00:10:32,280 It's another example of just how interconnected 315 00:10:32,280 --> 00:10:34,440 everything is in the Jupiter system. 316 00:10:34,440 --> 00:10:37,440 And it raises some really intriguing possibilities. 317 00:10:37,440 --> 00:10:41,040 We know that life, as we understand it, needs liquid water. 318 00:10:41,040 --> 00:10:41,880 Right. 319 00:10:41,880 --> 00:10:44,960 And if Europa has a vast salty ocean, 320 00:10:44,960 --> 00:10:47,040 well, who knows what might be lurking down there. 321 00:10:47,040 --> 00:10:49,820 Whoa, that's a mind blowing thought. 322 00:10:49,820 --> 00:10:52,480 This fiery volcanic moon might actually be helping 323 00:10:52,480 --> 00:10:55,280 to create conditions for life on another moon. 324 00:10:55,280 --> 00:10:57,640 Yeah, it's some serious cosmic irony. 325 00:10:57,640 --> 00:10:58,480 It really is. 326 00:10:58,480 --> 00:11:00,480 It just goes to show you that the universe 327 00:11:00,480 --> 00:11:01,600 is full of surprises. 328 00:11:01,600 --> 00:11:02,440 Yeah. 329 00:11:02,440 --> 00:11:04,280 And it highlights how much we still have to learn. 330 00:11:04,280 --> 00:11:05,280 It really does. 331 00:11:05,280 --> 00:11:06,880 Speaking of learning, you mentioned earlier 332 00:11:06,880 --> 00:11:10,760 that there are still a lot of mysteries surrounding Io. 333 00:11:10,760 --> 00:11:12,120 What are some of the big questions 334 00:11:12,120 --> 00:11:14,360 that scientists are trying to answer right now? 335 00:11:14,360 --> 00:11:17,160 Well, one of the biggest puzzles is the exact composition 336 00:11:17,160 --> 00:11:18,720 of Io's mantle. 337 00:11:18,720 --> 00:11:20,200 We know it's molten. 338 00:11:20,200 --> 00:11:22,840 We know it's driving all that volcanic activity. 339 00:11:22,840 --> 00:11:24,240 But what's it actually made of? 340 00:11:24,240 --> 00:11:27,360 What's the recipe for this incredible internal heat 341 00:11:27,360 --> 00:11:27,880 engine? 342 00:11:27,880 --> 00:11:30,520 It's like having this amazing machine, 343 00:11:30,520 --> 00:11:32,720 but not knowing what's going on under the hood. 344 00:11:32,720 --> 00:11:33,880 Yeah, exactly. 345 00:11:33,880 --> 00:11:35,760 And then there's the question of why 346 00:11:35,760 --> 00:11:39,400 some of UA's volcanoes are so much more violent than others. 347 00:11:39,400 --> 00:11:41,720 What are the factors that control the intensity 348 00:11:41,720 --> 00:11:43,760 and frequency of these eruptions? 349 00:11:43,760 --> 00:11:45,360 Is it the composition of the magma? 350 00:11:45,360 --> 00:11:47,240 Is it the depth of the magma chamber? 351 00:11:47,240 --> 00:11:49,320 We're still trying to figure all of that out. 352 00:11:49,320 --> 00:11:51,560 It's like each volcano has its own personality, 353 00:11:51,560 --> 00:11:53,600 and we're trying to get to know them all. 354 00:11:53,600 --> 00:11:55,400 That's a great way to think about it. 355 00:11:55,400 --> 00:11:57,440 And then there's this bigger question of how 356 00:11:57,440 --> 00:12:00,480 Io has managed to sustain this level of volcanic activity 357 00:12:00,480 --> 00:12:02,960 for billions of years. 358 00:12:02,960 --> 00:12:04,560 What's keeping it from cooling down? 359 00:12:04,560 --> 00:12:06,240 And is there something replenishing 360 00:12:06,240 --> 00:12:08,200 the heat in its interior? 361 00:12:08,200 --> 00:12:10,280 It seems like every answer we get about Io 362 00:12:10,280 --> 00:12:12,280 just leads to more questions. 363 00:12:12,280 --> 00:12:14,920 It's a cosmic mystery wrapped in an enigma. 364 00:12:14,920 --> 00:12:16,120 You got it. 365 00:12:16,120 --> 00:12:18,720 And that's what makes it so captivating for scientists. 366 00:12:18,720 --> 00:12:21,440 We're driven by this curiosity, by this desire 367 00:12:21,440 --> 00:12:24,000 to understand the how and the why of things. 368 00:12:24,000 --> 00:12:26,920 And Io is a perfect example of a place that just 369 00:12:26,920 --> 00:12:28,920 begs to be explored further. 370 00:12:28,920 --> 00:12:30,920 So how do we go about answering these questions? 371 00:12:30,920 --> 00:12:33,540 What kind of missions are on the horizon that could help us 372 00:12:33,540 --> 00:12:35,280 unlock Io's secrets? 373 00:12:35,280 --> 00:12:38,080 Well, there are a few exciting possibilities. 374 00:12:38,080 --> 00:12:42,880 NASA's Juno spacecraft, which is currently orbiting Jupiter. 375 00:12:42,880 --> 00:12:45,880 It's already made some observations of Io. 376 00:12:45,880 --> 00:12:48,160 It's not a dedicated Io mission. 377 00:12:48,160 --> 00:12:49,960 But it's giving us some valuable data 378 00:12:49,960 --> 00:12:53,560 about Io's magnetic field and its interaction with Jupiter. 379 00:12:53,560 --> 00:12:55,160 So it's like getting bonus information 380 00:12:55,160 --> 00:12:56,680 from a mission that's already out there. 381 00:12:56,680 --> 00:12:57,400 Exactly. 382 00:12:57,400 --> 00:12:58,240 That's pretty cool. 383 00:12:58,240 --> 00:13:01,840 But what we really need is a dedicated mission to Io, 384 00:13:01,840 --> 00:13:05,160 one that can orbit the moon and study it in detail. 385 00:13:05,160 --> 00:13:06,960 There have been several mission concepts 386 00:13:06,960 --> 00:13:08,760 proposed over the years. 387 00:13:08,760 --> 00:13:10,440 And there's definitely a growing interest 388 00:13:10,440 --> 00:13:12,960 in the scientific community to make this happen. 389 00:13:12,960 --> 00:13:15,640 Yeah, I can imagine a dedicated Io mission 390 00:13:15,640 --> 00:13:16,600 would be incredible. 391 00:13:16,600 --> 00:13:18,200 What kind of data could we collect 392 00:13:18,200 --> 00:13:19,520 with a mission like that? 393 00:13:19,520 --> 00:13:23,240 Well, we could map Io's surface in unprecedented detail. 394 00:13:23,240 --> 00:13:26,880 We could study the composition of its volcanic plumes. 395 00:13:26,880 --> 00:13:28,520 And we could even track the changes 396 00:13:28,520 --> 00:13:30,760 in its volcanic activity over time. 397 00:13:30,760 --> 00:13:31,260 Wow. 398 00:13:31,260 --> 00:13:32,960 We could also get a much clearer picture 399 00:13:32,960 --> 00:13:35,280 of its interior structure and the processes 400 00:13:35,280 --> 00:13:36,760 that drive its volcanism. 401 00:13:36,760 --> 00:13:38,960 It sounds like a mission that could rewrite the textbooks 402 00:13:38,960 --> 00:13:39,840 on Io. 403 00:13:39,840 --> 00:13:42,680 It has the potential to be a real game changer, 404 00:13:42,680 --> 00:13:45,240 and not just for our understanding of Io, 405 00:13:45,240 --> 00:13:47,720 but also for our understanding of volcanic processes 406 00:13:47,720 --> 00:13:50,960 on other worlds, both in our solar system and beyond. 407 00:13:50,960 --> 00:13:52,560 I'm definitely keeping my fingers crossed 408 00:13:52,560 --> 00:13:55,920 that a dedicated Io mission gets the green light. 409 00:13:55,920 --> 00:13:58,000 It'd be amazing to see what we could learn. 410 00:13:58,000 --> 00:14:02,000 But in the meantime, what can we do to keep exploring 411 00:14:02,000 --> 00:14:04,040 this fascinating moon from afar? 412 00:14:04,040 --> 00:14:06,520 Well, there are some incredible images and data 413 00:14:06,520 --> 00:14:09,000 available online from previous missions. 414 00:14:09,000 --> 00:14:11,240 You can explore Io virtually from the comfort 415 00:14:11,240 --> 00:14:13,160 of your own home. 416 00:14:13,160 --> 00:14:15,720 And of course, keep following the latest news and research 417 00:14:15,720 --> 00:14:18,520 coming from the scientists that are studying Io. 418 00:14:18,520 --> 00:14:20,560 There are always new discoveries being made. 419 00:14:20,560 --> 00:14:22,920 It's inspiring to think about all the secrets that are still 420 00:14:22,920 --> 00:14:24,160 waiting to be uncovered. 421 00:14:24,160 --> 00:14:26,600 And that's the beauty of space exploration, isn't it? 422 00:14:26,600 --> 00:14:28,760 There's always something new to discover something 423 00:14:28,760 --> 00:14:30,560 that will challenge our understanding 424 00:14:30,560 --> 00:14:32,720 and push us to ask more questions. 425 00:14:32,720 --> 00:14:35,640 Well, I'm definitely ready to dive into more of those questions. 426 00:14:35,640 --> 00:14:38,600 But before we do, I think we need to take another quick break. 427 00:14:38,600 --> 00:14:41,680 When we come back, let's talk about the bigger picture. 428 00:14:41,680 --> 00:14:44,240 What does Io teach us about the universe? 429 00:14:44,240 --> 00:14:46,360 And what are the implications of its discoveries 430 00:14:46,360 --> 00:14:48,280 for our search for life beyond Earth? 431 00:14:48,280 --> 00:14:51,480 I'm ready to explore those big questions when we return. 432 00:14:51,480 --> 00:14:53,840 Welcome back to Cosmos in a Pod. 433 00:14:53,840 --> 00:14:55,380 Before the break, we were just starting 434 00:14:55,380 --> 00:14:57,640 to touch on some of the bigger questions that Io raises. 435 00:14:57,640 --> 00:14:58,140 Right. 436 00:14:58,140 --> 00:15:00,800 We've explored the volcanoes and the crazy surface 437 00:15:00,800 --> 00:15:03,440 and the impact on Jupiter. 438 00:15:03,440 --> 00:15:04,880 But what does it all mean? 439 00:15:04,880 --> 00:15:07,000 What does Io teach us about the universe 440 00:15:07,000 --> 00:15:08,720 beyond our own planet? 441 00:15:08,720 --> 00:15:11,220 Well, for me, one of the biggest takeaways is that the universe 442 00:15:11,220 --> 00:15:13,800 is a much more dynamic and interconnected place 443 00:15:13,800 --> 00:15:14,960 than we ever imagined. 444 00:15:14,960 --> 00:15:15,400 OK. 445 00:15:15,400 --> 00:15:16,320 Unpack that a bit. 446 00:15:16,320 --> 00:15:18,400 What do you mean by dynamic and interconnected? 447 00:15:18,400 --> 00:15:18,900 OK. 448 00:15:18,900 --> 00:15:19,520 So think about it. 449 00:15:19,520 --> 00:15:22,120 For centuries, we humans, we looked up at the stars 450 00:15:22,120 --> 00:15:25,360 and saw these seemingly unchanging points of light. 451 00:15:25,360 --> 00:15:27,040 And we thought of planets and moons 452 00:15:27,040 --> 00:15:30,360 as these static, almost lifeless objects. 453 00:15:30,360 --> 00:15:33,040 But Io throws all that out the window. 454 00:15:33,040 --> 00:15:34,320 Yeah, it's definitely not static. 455 00:15:34,320 --> 00:15:37,040 It's like a giant volcanic fireworks show that never ends. 456 00:15:37,040 --> 00:15:38,000 Exactly. 457 00:15:38,000 --> 00:15:41,280 And that constant activity, that dynamism, 458 00:15:41,280 --> 00:15:44,640 it tells us that the universe is in constant motion. 459 00:15:44,640 --> 00:15:45,920 It's constantly evolving. 460 00:15:45,920 --> 00:15:49,360 It's not this static picture that we once thought it was. 461 00:15:49,360 --> 00:15:51,440 So Io is like a cosmic wake-up call, 462 00:15:51,440 --> 00:15:53,480 telling us to rethink our assumptions about how 463 00:15:53,480 --> 00:15:54,560 the universe works. 464 00:15:54,560 --> 00:15:56,120 Precisely. 465 00:15:56,120 --> 00:15:58,040 And it's not just about dynamism either. 466 00:15:58,040 --> 00:16:00,920 Remember how we talked about Io's influence on Jupiter 467 00:16:00,920 --> 00:16:01,800 and its other moons? 468 00:16:01,800 --> 00:16:03,820 It's not just this isolated little world 469 00:16:03,820 --> 00:16:05,000 doing its own thing. 470 00:16:05,000 --> 00:16:05,500 Right. 471 00:16:05,500 --> 00:16:07,960 It's creating that plasma torus around Jupiter. 472 00:16:07,960 --> 00:16:11,360 And it's potentially helping to keep Europa's ocean liquid. 473 00:16:11,360 --> 00:16:13,720 It's got its fiery fingers and a lot of cosmic pies. 474 00:16:13,720 --> 00:16:14,900 That's a great way to put it. 475 00:16:14,900 --> 00:16:18,160 And that interconnectedness is a crucial concept in astronomy. 476 00:16:18,160 --> 00:16:21,120 It reminds us that we can just study objects in isolation. 477 00:16:21,120 --> 00:16:22,920 We have to consider their relationships, 478 00:16:22,920 --> 00:16:25,440 their interactions to truly understand how they work. 479 00:16:25,440 --> 00:16:28,880 So Io is like a poster child for cosmic interconnectedness. 480 00:16:28,880 --> 00:16:29,880 I'd say so. 481 00:16:29,880 --> 00:16:32,760 And that brings us to perhaps the most profound implication 482 00:16:32,760 --> 00:16:35,320 of Io's discoveries, its potential role 483 00:16:35,320 --> 00:16:37,440 in creating conditions for life on Europa. 484 00:16:37,440 --> 00:16:38,120 Right. 485 00:16:38,120 --> 00:16:40,760 We talked about how those tidal forces, the same ones that 486 00:16:40,760 --> 00:16:45,520 are making Euro erupt, could be keeping Europa's ocean liquid. 487 00:16:45,520 --> 00:16:49,760 It's mind boggling to think that this fiery volcanic moon might 488 00:16:49,760 --> 00:16:52,560 indirectly be helping to create an environment where 489 00:16:52,560 --> 00:16:53,760 life could exist. 490 00:16:53,760 --> 00:16:54,560 Yeah. 491 00:16:54,560 --> 00:16:56,080 It really challenges our assumptions 492 00:16:56,080 --> 00:16:58,280 about what a habitable world might look like. 493 00:16:58,280 --> 00:17:00,400 For a long time, we focused on finding planets 494 00:17:00,400 --> 00:17:03,400 that were just the right distance from their stars, 495 00:17:03,400 --> 00:17:07,040 in that so-called Goldilocks zone, where liquid water could 496 00:17:07,040 --> 00:17:08,080 exist on the surface. 497 00:17:08,080 --> 00:17:10,440 But Europa is showing us that habitability might not 498 00:17:10,440 --> 00:17:13,680 be so simple, that life could find a way, even 499 00:17:13,680 --> 00:17:15,480 in these seemingly extreme environments. 500 00:17:15,480 --> 00:17:16,360 Exactly. 501 00:17:16,360 --> 00:17:18,560 It's expanding our definition of what's possible. 502 00:17:18,560 --> 00:17:20,600 And it's giving us new hope in our search for life 503 00:17:20,600 --> 00:17:21,920 beyond Earth. 504 00:17:21,920 --> 00:17:23,440 Maybe we don't need to limit ourselves 505 00:17:23,440 --> 00:17:25,400 to those perfect Earth-like planets. 506 00:17:25,400 --> 00:17:28,240 Maybe life is more resilient, more adaptable than we thought. 507 00:17:28,240 --> 00:17:29,960 It's a humbling and exciting thought. 508 00:17:29,960 --> 00:17:32,200 And it makes you wonder what other surprises are out there 509 00:17:32,200 --> 00:17:33,840 just waiting to be discovered. 510 00:17:33,840 --> 00:17:36,040 That's the beauty of space exploration, isn't it? 511 00:17:36,040 --> 00:17:37,840 Every time we think we have it figured out, 512 00:17:37,840 --> 00:17:39,800 the universe throws us a curveball, something 513 00:17:39,800 --> 00:17:42,360 like Io, that makes us rethink everything. 514 00:17:42,360 --> 00:17:43,920 So what's next? 515 00:17:43,920 --> 00:17:47,680 What are the big questions that we still need to answer about Io? 516 00:17:47,680 --> 00:17:49,960 And how do we go about answering them? 517 00:17:49,960 --> 00:17:53,240 Well, there's still so much we don't know about Io's interior. 518 00:17:53,240 --> 00:17:55,520 What's the exact composition of its mantle? 519 00:17:55,520 --> 00:17:57,560 How is it generating so much heat? 520 00:17:57,560 --> 00:17:59,240 And what are the long-term implications 521 00:17:59,240 --> 00:18:01,160 of all that volcanic activity? 522 00:18:01,160 --> 00:18:04,040 It sounds like we need to send a dedicated mission to Io, 523 00:18:04,040 --> 00:18:06,760 something that can really dive deep into its secrets. 524 00:18:06,760 --> 00:18:07,480 Absolutely. 525 00:18:07,480 --> 00:18:09,840 And thankfully, there are some exciting mission concepts 526 00:18:09,840 --> 00:18:11,200 being developed right now. 527 00:18:11,200 --> 00:18:13,200 One proposal involves a spacecraft 528 00:18:13,200 --> 00:18:16,040 that would orbit Io for several years, 529 00:18:16,040 --> 00:18:18,240 mapping its surface, studying its volcanoes, 530 00:18:18,240 --> 00:18:20,920 and even collecting samples of its volcanic plumes. 531 00:18:20,920 --> 00:18:23,920 Imagine the data we could get from a mission like that. 532 00:18:23,920 --> 00:18:26,120 It would revolutionize our understanding of Io. 533 00:18:26,120 --> 00:18:27,440 It would be a game changer. 534 00:18:27,440 --> 00:18:30,320 And it wouldn't just benefit our understanding of Io. 535 00:18:30,320 --> 00:18:32,360 It would also provide valuable insights 536 00:18:32,360 --> 00:18:36,120 into volcanic processes on other worlds, including Earth. 537 00:18:36,120 --> 00:18:38,960 It's incredible to think that this little moon, 538 00:18:38,960 --> 00:18:42,400 orbiting a giant planet billions of miles away, 539 00:18:42,400 --> 00:18:44,720 could teach us so much about our own planet. 540 00:18:44,720 --> 00:18:46,960 That's the power of space exploration, isn't it? 541 00:18:46,960 --> 00:18:48,960 It broadens our perspective. 542 00:18:48,960 --> 00:18:51,040 It challenges our assumptions. 543 00:18:51,040 --> 00:18:52,880 And ultimately, it helps us to understand 544 00:18:52,880 --> 00:18:55,320 our place in the cosmos a little bit better. 545 00:18:55,320 --> 00:18:57,400 Well, I think it's safe to say that Io has left 546 00:18:57,400 --> 00:18:59,720 a lasting impression on us today. 547 00:18:59,720 --> 00:19:01,080 It's a reminder that the universe 548 00:19:01,080 --> 00:19:04,440 is full of wonder and mystery and endless possibilities. 549 00:19:04,440 --> 00:19:07,160 And that the search for knowledge, for understanding, 550 00:19:07,160 --> 00:19:10,320 is one of the most rewarding journeys we can undertake. 551 00:19:10,320 --> 00:19:11,960 Well, thank you so much for taking us 552 00:19:11,960 --> 00:19:15,640 on this incredible journey to the fiery world of Io. 553 00:19:15,640 --> 00:19:16,840 It's been an absolute pleasure. 554 00:19:16,840 --> 00:19:18,440 The pleasure was all mine. 555 00:19:18,440 --> 00:19:20,920 And to all our listeners out there, keep exploring, 556 00:19:20,920 --> 00:19:23,880 keep asking questions, and never lose your sense of wonder. 557 00:19:23,880 --> 00:19:25,920 The universe is waiting to be discovered. 558 00:19:25,920 --> 00:19:27,640 And don't forget to follow and subscribe 559 00:19:27,640 --> 00:19:30,320 to Cosmos in a Pod and our YouTube channel 560 00:19:30,320 --> 00:19:33,320 for more exciting deep dives into the universe. 561 00:19:33,320 --> 00:19:47,680 Until next time, keep looking up.