1 00:00:00,000 --> 00:00:06,360 Imagine a little spacecraft way out there, billions of miles, trying to figure out what's 2 00:00:06,360 --> 00:00:07,840 going on with these other planets. 3 00:00:07,840 --> 00:00:12,160 A long lonely journey pushing the limits of everything we know. 4 00:00:12,160 --> 00:00:15,940 Welcome to Cosmos Cinepod, our space and astronomy series. 5 00:00:15,940 --> 00:00:24,360 So today we're heading out way out past Mars to those gas giants, Jupiter, Saturn, Uranus, 6 00:00:24,360 --> 00:00:26,960 Neptune, the whole gang. 7 00:00:26,960 --> 00:00:30,520 What makes these places so interesting and how do we even send stuff out there to look 8 00:00:30,520 --> 00:00:31,520 around? 9 00:00:31,520 --> 00:00:37,280 Well, it's a story of ambition and this human need to know what's out there. 10 00:00:37,280 --> 00:00:39,160 Okay, so first off, why bother? 11 00:00:39,160 --> 00:00:40,960 They're so far away and so different. 12 00:00:40,960 --> 00:00:42,120 What makes them worth the effort? 13 00:00:42,120 --> 00:00:44,040 Well, it's more than just their size, right? 14 00:00:44,040 --> 00:00:47,440 They're like time capsules from way back, like when the solar system was just starting. 15 00:00:47,440 --> 00:00:50,600 So by setting them, we're kind of looking back at how our planet got started too. 16 00:00:50,600 --> 00:00:51,600 Yeah, exactly. 17 00:00:51,600 --> 00:00:56,280 They can tell us about how planets form, where different elements ended up, maybe even the 18 00:00:56,280 --> 00:00:58,560 conditions for life way back then. 19 00:00:58,560 --> 00:00:59,640 That's fascinating. 20 00:00:59,640 --> 00:01:01,240 But it's not all about the past, right? 21 00:01:01,240 --> 00:01:05,120 There's this whole question of if there's life out there somewhere else. 22 00:01:05,120 --> 00:01:06,200 Oh, for sure. 23 00:01:06,200 --> 00:01:13,080 And some of the moons around those gas giants, places like Europa and Enceladus, have scientists 24 00:01:13,080 --> 00:01:14,080 really excited. 25 00:01:14,080 --> 00:01:15,240 Oh yeah, I've heard of those. 26 00:01:15,240 --> 00:01:16,520 What makes them so special? 27 00:01:16,520 --> 00:01:21,000 Well, we think they might have these huge oceans, like hidden under the ice. 28 00:01:21,000 --> 00:01:22,600 And you know what they say about water? 29 00:01:22,600 --> 00:01:24,960 Yeah, where there's water, there could be life. 30 00:01:24,960 --> 00:01:27,880 And that, alien life, right here in our solar system. 31 00:01:27,880 --> 00:01:28,880 Exactly. 32 00:01:28,880 --> 00:01:30,040 It's a huge motivator. 33 00:01:30,040 --> 00:01:33,600 Those oceans could have like whole ecosystems we've never seen before. 34 00:01:33,600 --> 00:01:35,240 That would be amazing. 35 00:01:35,240 --> 00:01:37,880 But let's be real, getting out there is a challenge. 36 00:01:37,880 --> 00:01:39,440 We're talking billions of miles. 37 00:01:39,440 --> 00:01:41,960 Oh, it's a huge effort, that's for sure. 38 00:01:41,960 --> 00:01:47,280 Big rockets, precise calculations, and a little bit of, well, cosmic trickery. 39 00:01:47,280 --> 00:01:48,280 Cosmic trickery. 40 00:01:48,280 --> 00:01:49,280 Now that sounds interesting. 41 00:01:49,280 --> 00:01:50,560 Think of it like a slingshot. 42 00:01:50,560 --> 00:01:55,540 But with planets, you use the gravity of a planet like Earth or maybe Venus to get a 43 00:01:55,540 --> 00:01:57,800 speed boost towards your target. 44 00:01:57,800 --> 00:01:59,280 Saves fuel too. 45 00:01:59,280 --> 00:02:01,480 Like using the solar system as a highway. 46 00:02:01,480 --> 00:02:02,480 Exactly. 47 00:02:02,480 --> 00:02:04,640 Voyager 2 on its way to Neptune did that. 48 00:02:04,640 --> 00:02:07,960 It got a boost from Jupiter, then Saturn, then Uranus. 49 00:02:07,960 --> 00:02:08,960 Pretty clever. 50 00:02:08,960 --> 00:02:09,960 Yeah. 51 00:02:09,960 --> 00:02:11,880 But even with those boosts, we're talking years, right? 52 00:02:11,880 --> 00:02:12,880 Decades even. 53 00:02:12,880 --> 00:02:13,960 That's the thing with space. 54 00:02:13,960 --> 00:02:19,280 Cassini took seven years to reach Saturn, and Voyager 1, two years to Jupiter. 55 00:02:19,280 --> 00:02:20,280 It's a long game. 56 00:02:20,280 --> 00:02:21,280 Wow. 57 00:02:21,280 --> 00:02:22,400 That's dedication. 58 00:02:22,400 --> 00:02:26,040 But once they're out there, how do they stay powered up? 59 00:02:26,040 --> 00:02:27,880 It's got to be pretty dark and cold that far out. 60 00:02:27,880 --> 00:02:29,680 Well, that's where the ingenuity comes in. 61 00:02:29,680 --> 00:02:33,960 They use something called RTGs, radioisotope thermoelectric generators. 62 00:02:33,960 --> 00:02:34,960 Okay. 63 00:02:34,960 --> 00:02:35,960 RTGs, huh? 64 00:02:35,960 --> 00:02:36,960 What exactly are those? 65 00:02:36,960 --> 00:02:41,600 It's basically a tiny nuclear power plant using the heat from plutonium decay to make 66 00:02:41,600 --> 00:02:42,840 electricity. 67 00:02:42,840 --> 00:02:46,400 It lets them run for years, even decades, out in the cold and dark. 68 00:02:46,400 --> 00:02:47,400 Wow. 69 00:02:47,400 --> 00:02:48,400 Pretty impressive. 70 00:02:48,400 --> 00:02:49,400 But what about staying in touch? 71 00:02:49,400 --> 00:02:52,200 How do they talk to us over such vast distances? 72 00:02:52,200 --> 00:02:53,240 Communication is key, of course. 73 00:02:53,240 --> 00:02:56,580 It all comes down to technology and patience. 74 00:02:56,580 --> 00:03:01,600 The probes have these big antennas to send signals back to Earth, to NASA's deep space 75 00:03:01,600 --> 00:03:02,600 network. 76 00:03:02,600 --> 00:03:06,160 Oh, so like giant ears listening for these tiny whispers from across the solar system. 77 00:03:06,160 --> 00:03:07,160 Yeah, something like that. 78 00:03:07,160 --> 00:03:10,560 But even at the speed of light, those signals can take hours. 79 00:03:10,560 --> 00:03:13,000 Imagine waiting four hours for a message from Neptune. 80 00:03:13,000 --> 00:03:14,520 I can't even imagine. 81 00:03:14,520 --> 00:03:19,680 Speaking of messages, what kind of tools do these probes have to learn about all this 82 00:03:19,680 --> 00:03:20,680 stuff? 83 00:03:20,680 --> 00:03:23,640 Well, they're like flying labs, really, packed with all sorts of instruments. 84 00:03:23,640 --> 00:03:24,640 Like what? 85 00:03:24,640 --> 00:03:25,640 Well, you got to have cameras, right? 86 00:03:25,640 --> 00:03:31,920 They capture those amazing pictures of planets, rings, moons, surfaces, weather, hints about 87 00:03:31,920 --> 00:03:32,920 what's inside. 88 00:03:32,920 --> 00:03:36,800 Like a cosmic paparazzi, but for science. 89 00:03:36,800 --> 00:03:40,720 Yeah, but the pictures are just the start. 90 00:03:40,720 --> 00:03:43,960 Those images give scientists tons of data. 91 00:03:43,960 --> 00:03:44,960 So what else do they have? 92 00:03:44,960 --> 00:03:46,080 They use spectrometers. 93 00:03:46,080 --> 00:03:47,240 Those are like detectives. 94 00:03:47,240 --> 00:03:50,200 They figure out what atmospheres and surfaces are made of. 95 00:03:50,200 --> 00:03:53,400 So like fingerprint analysts, but for planets. 96 00:03:53,400 --> 00:03:55,140 Yeah, that's a good way to put it. 97 00:03:55,140 --> 00:03:59,320 For example, because of spectrometers, we know that Titan has a methane atmosphere and 98 00:03:59,320 --> 00:04:01,880 Europa's surface is mostly water ice. 99 00:04:01,880 --> 00:04:02,880 Amazing. 100 00:04:02,880 --> 00:04:03,880 Anything else? 101 00:04:03,880 --> 00:04:04,880 Magnetometers. 102 00:04:04,880 --> 00:04:05,880 They measure magnetic fields. 103 00:04:05,880 --> 00:04:09,560 And that tells us about the inside of a planet, like what's going on in its core and how it 104 00:04:09,560 --> 00:04:12,080 interacts with solar wind. 105 00:04:12,080 --> 00:04:16,040 So probing those like invisible forces that shape the planets. 106 00:04:16,040 --> 00:04:17,040 Exactly. 107 00:04:17,040 --> 00:04:20,400 And then there's radar, super important for those icy moons. 108 00:04:20,400 --> 00:04:22,980 Why is radar so good for icy moons? 109 00:04:22,980 --> 00:04:24,680 Because it can see through the ice. 110 00:04:24,680 --> 00:04:30,180 So we can map what's underneath like those possible oceans on Europa and Enceladus. 111 00:04:30,180 --> 00:04:32,880 Like X-ray vision for icy worlds. 112 00:04:32,880 --> 00:04:33,880 Yeah. 113 00:04:33,880 --> 00:04:34,880 That's incredible. 114 00:04:34,880 --> 00:04:37,160 All those instruments working together to help us understand these planets. 115 00:04:37,160 --> 00:04:38,880 A symphony of science and tech. 116 00:04:38,880 --> 00:04:43,480 Now let's talk about some of the stars of the show, those famous missions that have 117 00:04:43,480 --> 00:04:45,360 made these discoveries. 118 00:04:45,360 --> 00:04:47,600 What are some of the biggest names and what did they find? 119 00:04:47,600 --> 00:04:52,920 Well the history of exploring the outer solar system is full of pioneers, each mission building 120 00:04:52,920 --> 00:04:54,640 on what came before it. 121 00:04:54,640 --> 00:04:55,640 Let's start at the beginning. 122 00:04:55,640 --> 00:04:58,240 Who were the first ones to get out there? 123 00:04:58,240 --> 00:05:02,600 The first ones were pioneer 10 and 11 back in the early 70s. 124 00:05:02,600 --> 00:05:05,440 The first to really check out Jupiter and Saturn. 125 00:05:05,440 --> 00:05:07,640 They paved the way for everything that followed. 126 00:05:07,640 --> 00:05:09,680 Like the Lewis and Clark of the outer solar system. 127 00:05:09,680 --> 00:05:10,680 Yeah, I like that. 128 00:05:10,680 --> 00:05:15,060 There were so many unknowns back then, but they got the data and showed it could be done. 129 00:05:15,060 --> 00:05:16,340 What about Voyager? 130 00:05:16,340 --> 00:05:18,240 Those are some of the most famous, right? 131 00:05:18,240 --> 00:05:19,240 Oh definitely. 132 00:05:19,240 --> 00:05:20,880 Voyager 1 and 2. 133 00:05:20,880 --> 00:05:26,040 Launched in 1977, they went on what we call the Grand Tour, visiting Jupiter, Saturn, 134 00:05:26,040 --> 00:05:27,480 Uranus, and Neptune. 135 00:05:27,480 --> 00:05:28,480 Wow. 136 00:05:28,480 --> 00:05:29,480 What a road trip. 137 00:05:29,480 --> 00:05:30,480 What did they find out there? 138 00:05:30,480 --> 00:05:35,200 Well Voyager 1 got the first good images of Jupiter's Great Red Spot, showing how wild 139 00:05:35,200 --> 00:05:36,240 and turbulent it is. 140 00:05:36,240 --> 00:05:37,960 I remember those images. 141 00:05:37,960 --> 00:05:38,960 Pretty mind blowing. 142 00:05:38,960 --> 00:05:43,080 And Voyager 2 got to Saturn and saw all these intricate structures in the rings, including 143 00:05:43,080 --> 00:05:45,680 those little shepherd moons that help keep them in shape. 144 00:05:45,680 --> 00:05:48,440 Crazy that something so small can control something so big. 145 00:05:48,440 --> 00:05:51,600 It really shows you how delicate the balance is out there. 146 00:05:51,600 --> 00:05:57,000 Oh, and let's not forget Voyager 2 going past Neptune and finding six new moons, plus 147 00:05:57,000 --> 00:06:02,240 that planet's wild atmosphere with its own big storm, like the Great Red Spot but dark. 148 00:06:02,240 --> 00:06:03,240 That's amazing. 149 00:06:03,240 --> 00:06:04,240 So many discoveries. 150 00:06:04,240 --> 00:06:07,640 But what about missions to just one planet, like Jupiter? 151 00:06:07,640 --> 00:06:08,640 Right. 152 00:06:08,640 --> 00:06:14,000 Well there was Galileo, orbited Jupiter from 1995 to 2003. 153 00:06:14,000 --> 00:06:16,520 It taught us a lot about the planet and its moons. 154 00:06:16,520 --> 00:06:17,520 Like what? 155 00:06:17,520 --> 00:06:21,200 Well it actually saw a comet hit Jupiter, Comet Shoemaker Levy 9, back in 94. 156 00:06:21,200 --> 00:06:23,720 Got to see all those pieces crashing into the atmosphere. 157 00:06:23,720 --> 00:06:24,720 Ah, wow. 158 00:06:24,720 --> 00:06:25,720 That must have been something else. 159 00:06:25,720 --> 00:06:30,000 It was a big deal for scientists, figuring out what Jupiter's atmosphere is made of 160 00:06:30,000 --> 00:06:31,600 and how those impacts work. 161 00:06:31,600 --> 00:06:32,600 Incredible. 162 00:06:32,600 --> 00:06:33,600 Anything else? 163 00:06:33,600 --> 00:06:38,120 The biggest discovery was that there's probably a saltwater ocean under the ice on Europa. 164 00:06:38,120 --> 00:06:40,320 Adding to the idea that there might be life there. 165 00:06:40,320 --> 00:06:41,320 Exactly. 166 00:06:41,320 --> 00:06:45,920 And Galileo also studied Jupiter's magnetic field and how it messes with the moons, giving 167 00:06:45,920 --> 00:06:49,760 us a much clearer picture of the whole Jovian system. 168 00:06:49,760 --> 00:06:50,760 That's fascinating. 169 00:06:50,760 --> 00:06:53,540 So we've got Pioneer, Voyager, and Galileo. 170 00:06:53,540 --> 00:06:55,520 Any other standout missions? 171 00:06:55,520 --> 00:06:56,800 Oh, absolutely. 172 00:06:56,800 --> 00:07:04,400 We can't forget Cassini-Huygens, which spent 13 years from 2004 to 2017 checking out Saturn 173 00:07:04,400 --> 00:07:05,400 and its moons. 174 00:07:05,400 --> 00:07:06,400 Oh yeah, Cassini. 175 00:07:06,400 --> 00:07:08,760 Those were some incredible pictures of Saturn's rings. 176 00:07:08,760 --> 00:07:14,200 Oh yeah, Cassini showed just how complex and dynamic those rings are. 177 00:07:14,200 --> 00:07:18,320 Constantly changing with little moonlets embedded in them, making waves and gaps. 178 00:07:18,320 --> 00:07:21,640 Like a cosmic dance, with the rings and moons moving together. 179 00:07:21,640 --> 00:07:22,980 I love that. 180 00:07:22,980 --> 00:07:25,380 But Cassini was about more than just the rings. 181 00:07:25,380 --> 00:07:29,360 It carried that Huygens probe, the one that landed on Titan in 2005. 182 00:07:29,360 --> 00:07:30,680 We landed something on Titan. 183 00:07:30,680 --> 00:07:32,280 Yeah, big moment. 184 00:07:32,280 --> 00:07:34,680 Huygens sent back the first pictures from the surface. 185 00:07:34,680 --> 00:07:35,680 And guess what? 186 00:07:35,680 --> 00:07:38,520 Rivers, lakes, even seas? 187 00:07:38,520 --> 00:07:39,520 No way. 188 00:07:39,520 --> 00:07:40,520 That sounds kind of like Earth. 189 00:07:40,520 --> 00:07:41,520 Right. 190 00:07:41,520 --> 00:07:42,520 But there's a twist. 191 00:07:42,520 --> 00:07:43,520 They're not water. 192 00:07:43,520 --> 00:07:44,520 Well, okay. 193 00:07:44,520 --> 00:07:45,520 Then what are they? 194 00:07:45,520 --> 00:07:47,600 Liquid methane and ethane. 195 00:07:47,600 --> 00:07:49,680 Titan's so cold that those things are liquid. 196 00:07:49,680 --> 00:07:51,720 Imagine rain made of methane. 197 00:07:51,720 --> 00:07:52,720 Wild. 198 00:07:52,720 --> 00:07:56,480 Titan's got its own weather cycle, but with methane instead of water. 199 00:07:56,480 --> 00:07:57,480 Exactly. 200 00:07:57,480 --> 00:08:02,200 And Cassini also found something amazing at Enceladus, another of Saturn's moons. 201 00:08:02,200 --> 00:08:04,760 Didn't we say earlier that Enceladus might have life? 202 00:08:04,760 --> 00:08:05,760 Right. 203 00:08:05,760 --> 00:08:10,720 Well, Cassini saw plumes of water vapor shooting out from Enceladus' south pole, suggesting 204 00:08:10,720 --> 00:08:12,560 a big ocean under the ice. 205 00:08:12,560 --> 00:08:13,560 Wow. 206 00:08:13,560 --> 00:08:15,320 So even more evidence for those hidden oceans. 207 00:08:15,320 --> 00:08:16,320 Incredible. 208 00:08:16,320 --> 00:08:19,160 And those plumes have organic molecules, the stuff life's made of. 209 00:08:19,160 --> 00:08:22,360 So the idea that Enceladus could have life gets even stronger. 210 00:08:22,360 --> 00:08:23,360 That's awesome. 211 00:08:23,360 --> 00:08:26,320 So there are all these missions like Voyager and Cassini. 212 00:08:26,320 --> 00:08:27,720 What about anything going on right now? 213 00:08:27,720 --> 00:08:30,160 Well, there's Juno orbiting Jupiter. 214 00:08:30,160 --> 00:08:31,360 Got there in 2016. 215 00:08:31,360 --> 00:08:32,760 What's Juno doing up there? 216 00:08:32,760 --> 00:08:37,720 It's all about Jupiter's atmosphere, its magnetic field, and what's going on inside. 217 00:08:37,720 --> 00:08:43,340 It's already shown that the storms on Jupiter, like that great red spot, go really deep. 218 00:08:43,340 --> 00:08:47,400 So it's giving us a 3D view of Jupiter's weather. 219 00:08:47,400 --> 00:08:48,400 Kind of. 220 00:08:48,400 --> 00:08:54,000 It's kind of telling us about how the planet formed, how it changed over time, and its 221 00:08:54,000 --> 00:08:57,040 role in making the solar system what it is. 222 00:08:57,040 --> 00:08:59,880 Sounds like we're just getting started with what we can learn from these planets. 223 00:08:59,880 --> 00:09:00,880 Oh, definitely. 224 00:09:00,880 --> 00:09:02,560 So much more to uncover. 225 00:09:02,560 --> 00:09:03,560 Yeah. 226 00:09:03,560 --> 00:09:07,580 It really feels like the more we learn, the more we realize how much is still out there. 227 00:09:07,580 --> 00:09:09,600 Like peeling back layers of an onion, right? 228 00:09:09,600 --> 00:09:10,880 You just find more layers. 229 00:09:10,880 --> 00:09:11,880 Huh. 230 00:09:11,880 --> 00:09:12,880 Yeah, cosmic onion. 231 00:09:12,880 --> 00:09:18,080 But before we get totally lost in all that, let's focus on some of the coolest stuff 232 00:09:18,080 --> 00:09:19,440 out there. 233 00:09:19,440 --> 00:09:21,640 Those moons and rings, they're pretty amazing. 234 00:09:21,640 --> 00:09:22,640 Oh, for sure. 235 00:09:22,640 --> 00:09:24,540 They're like little solar systems all on their own. 236 00:09:24,540 --> 00:09:28,320 And they might hold the keys to figuring out if we're alone in the universe. 237 00:09:28,320 --> 00:09:30,720 Let's start with those icy moons. 238 00:09:30,720 --> 00:09:34,320 We keep coming back to Europa and Enceladus, what makes them so special. 239 00:09:34,320 --> 00:09:39,120 Well, we talked about it earlier, but they probably have these huge oceans under all 240 00:09:39,120 --> 00:09:40,120 that ice. 241 00:09:40,120 --> 00:09:44,440 And, you know, water's pretty important for life, at least the kind we know. 242 00:09:44,440 --> 00:09:46,200 So those oceans could be full of aliens. 243 00:09:46,200 --> 00:09:49,640 I mean, it's a cool thought, but how could anything live down there? 244 00:09:49,640 --> 00:09:51,480 It's got to be freezing and dark. 245 00:09:51,480 --> 00:09:53,640 Well, that's the big question, right? 246 00:09:53,640 --> 00:09:56,680 But those oceans are probably salty, like ours. 247 00:09:56,680 --> 00:10:00,880 And they might have those organic molecules, the building blocks for life. 248 00:10:00,880 --> 00:10:03,640 But how could anything survive under miles of ice? 249 00:10:03,640 --> 00:10:06,020 Okay, well, that's where things get interesting. 250 00:10:06,020 --> 00:10:11,800 That ice is like a shield, protecting the ocean from the cold and radiation from space. 251 00:10:11,800 --> 00:10:15,920 Plus, there might be hydrothermal vents on the ocean floor, you know, like the ones we 252 00:10:15,920 --> 00:10:17,640 have here on Earth. 253 00:10:17,640 --> 00:10:21,280 Those could provide the heat and energy for life to get a foothold. 254 00:10:21,280 --> 00:10:26,000 So imagine these hidden places, teeming with life, tucked away under all that ice. 255 00:10:26,000 --> 00:10:27,280 It's like science fiction. 256 00:10:27,280 --> 00:10:28,640 I know, right? 257 00:10:28,640 --> 00:10:30,160 And the evidence is pretty strong. 258 00:10:30,160 --> 00:10:35,000 We've seen those plumes of water vapor shooting out of Enceladus, and we've measured Europa's 259 00:10:35,000 --> 00:10:39,000 magnetic field changing, which hints at a salty ocean beneath. 260 00:10:39,000 --> 00:10:42,780 It's amazing to think that these, you know, seemingly barren balls of ice could be hiding 261 00:10:42,780 --> 00:10:43,780 so much. 262 00:10:43,780 --> 00:10:45,040 Yeah, and it's not just those two. 263 00:10:45,040 --> 00:10:50,240 There's Ganymede, Callisto, Titan, so many icy moons out there that we need to explore 264 00:10:50,240 --> 00:10:51,240 more. 265 00:10:51,240 --> 00:10:52,760 So many places that could have life. 266 00:10:52,760 --> 00:10:53,760 Mind-blowing. 267 00:10:53,760 --> 00:10:54,920 But what about those rings? 268 00:10:54,920 --> 00:10:57,120 Saturn's rings are like the most famous. 269 00:10:57,120 --> 00:10:59,040 Oh, yeah, they're iconic. 270 00:10:59,040 --> 00:11:02,400 A real symbol of how beautiful space can be. 271 00:11:02,400 --> 00:11:05,520 So vast and intricate, constantly shifting. 272 00:11:05,520 --> 00:11:08,040 A real dance of ice and rock. 273 00:11:08,040 --> 00:11:09,680 So what are they actually made of? 274 00:11:09,680 --> 00:11:11,220 Are they like solid? 275 00:11:11,220 --> 00:11:12,220 Not at all. 276 00:11:12,220 --> 00:11:16,120 They're made up of, I would say, like, countless pieces of ice and rock all orbiting Saturn 277 00:11:16,120 --> 00:11:17,120 together. 278 00:11:17,120 --> 00:11:18,120 Some are tiny, like dust grains. 279 00:11:18,120 --> 00:11:19,120 Others are huge, like house-size. 280 00:11:19,120 --> 00:11:23,360 They're like a giant disco ball, but with ice and rock instead of glitter. 281 00:11:23,360 --> 00:11:24,360 Yeah. 282 00:11:24,360 --> 00:11:26,040 But the cool thing is, they're not just pretty. 283 00:11:26,040 --> 00:11:29,920 They actually change and move because of the gravity from Saturn's moons. 284 00:11:29,920 --> 00:11:31,560 Wait, the moons affect the rings? 285 00:11:31,560 --> 00:11:35,880 Yeah, some of them we call them shepherd moons, orbit really close to the rings or even inside 286 00:11:35,880 --> 00:11:36,880 them. 287 00:11:36,880 --> 00:11:41,680 And their gravity keeps the ring particles in line, creating gaps, waves, even grades. 288 00:11:41,680 --> 00:11:45,720 It's like the moons are choreographing this giant cosmic ballet. 289 00:11:45,720 --> 00:11:47,320 That's a great way to put it. 290 00:11:47,320 --> 00:11:49,280 And Cassini, remember that mission? 291 00:11:49,280 --> 00:11:53,680 Well, it showed us that the rings are even more complex and active than we thought. 292 00:11:53,680 --> 00:11:57,860 We even saw moonlets forming within the rings, making these, like, propeller shapes as they 293 00:11:57,860 --> 00:11:59,880 plow through the ice particles. 294 00:11:59,880 --> 00:12:03,840 Incredible that something so small can have that much impact. 295 00:12:03,840 --> 00:12:04,840 Right. 296 00:12:04,840 --> 00:12:08,040 Even in the vastness of space, small things can make a big difference. 297 00:12:08,040 --> 00:12:10,360 Speaking of small, what about Pluto? 298 00:12:10,360 --> 00:12:15,840 I know it's not a planet anymore, but New Horizons, that probe that flew by in 2015, 299 00:12:15,840 --> 00:12:17,120 showed us some pretty amazing things. 300 00:12:17,120 --> 00:12:18,120 Oh, yeah. 301 00:12:18,120 --> 00:12:20,320 Pluto is way more interesting than anyone expected. 302 00:12:20,320 --> 00:12:24,920 For one, it's got this huge glacier made of nitrogen ice shaped like a heart. 303 00:12:24,920 --> 00:12:26,680 A heart, really? 304 00:12:26,680 --> 00:12:28,400 That's pretty cute for such a distant world. 305 00:12:28,400 --> 00:12:33,520 Yeah, they call it Tombaugh Regio, after Clyde Tombaugh, the guy who discovered Pluto. 306 00:12:33,520 --> 00:12:35,320 But there's more to it than just the heart. 307 00:12:35,320 --> 00:12:36,320 Like what? 308 00:12:36,320 --> 00:12:38,920 Well, there are huge mountains made of water ice. 309 00:12:38,920 --> 00:12:40,960 Some of them as tall as the Rockies. 310 00:12:40,960 --> 00:12:46,320 And these vast plains of nitrogen ice that move like glaciers. 311 00:12:46,320 --> 00:12:51,320 It even has a thin atmosphere, mostly nitrogen, with this blue haze. 312 00:12:51,320 --> 00:12:54,560 So Pluto's not a dead world at all, huh? 313 00:12:54,560 --> 00:12:56,160 Pretty active and diverse, actually. 314 00:12:56,160 --> 00:12:57,160 Exactly. 315 00:12:57,160 --> 00:13:01,440 It blew away all our old ideas about it, showed us that even way out there on the edge of 316 00:13:01,440 --> 00:13:05,240 the solar system, there are worlds full of surprises. 317 00:13:05,240 --> 00:13:08,900 It seems like every time we send something out there, we get more questions than answers. 318 00:13:08,900 --> 00:13:10,160 And that's what makes it so exciting. 319 00:13:10,160 --> 00:13:14,240 It's all about pushing the boundaries of what we know and seeing what's out there. 320 00:13:14,240 --> 00:13:17,940 It's amazing, you know, thinking about all these missions going so far. 321 00:13:17,940 --> 00:13:20,280 But it's got to be risky, right? 322 00:13:20,280 --> 00:13:25,120 Sending all this delicate equipment to like the harshest places imaginable. 323 00:13:25,120 --> 00:13:26,120 Oh, yeah. 324 00:13:26,120 --> 00:13:28,920 Space exploration is always a challenge, especially when you're talking about the outer solar 325 00:13:28,920 --> 00:13:29,920 system. 326 00:13:29,920 --> 00:13:32,120 What are some of the like biggest challenges they face? 327 00:13:32,120 --> 00:13:33,480 What do they worry about the most? 328 00:13:33,480 --> 00:13:35,680 Well, first, you got to get off the ground right. 329 00:13:35,680 --> 00:13:38,100 Launching one of those probes, it's a huge operation. 330 00:13:38,100 --> 00:13:40,480 So many things got to go exactly right. 331 00:13:40,480 --> 00:13:43,320 Like a giant machine with no room for mistakes. 332 00:13:43,320 --> 00:13:44,320 Exactly. 333 00:13:44,320 --> 00:13:48,000 And even once you're up there in space, anything can happen. 334 00:13:48,000 --> 00:13:50,340 Equipment could break, communications could fail. 335 00:13:50,340 --> 00:13:52,080 You could run into space junk. 336 00:13:52,080 --> 00:13:54,840 It's a constant fight against, well, the universe itself. 337 00:13:54,840 --> 00:13:58,920 So it takes a lot of planning and some luck, too, I guess. 338 00:13:58,920 --> 00:13:59,920 You got it. 339 00:13:59,920 --> 00:14:03,020 But even with the best planning, there are always things you can't predict. 340 00:14:03,020 --> 00:14:06,000 It's a it's high risk, high reward. 341 00:14:06,000 --> 00:14:09,660 And when something does go wrong, it must be tough on the teams that have worked so 342 00:14:09,660 --> 00:14:11,080 hard for so long. 343 00:14:11,080 --> 00:14:12,400 Oh, absolutely. 344 00:14:12,400 --> 00:14:18,920 These missions, they represent so much people's dreams, years of work, so much dedication. 345 00:14:18,920 --> 00:14:23,800 But even when there are setbacks, there's always that that drive to learn from it and 346 00:14:23,800 --> 00:14:24,800 do better next time. 347 00:14:24,800 --> 00:14:28,280 It's that I guess that human spirit that keeps us exploring, right? 348 00:14:28,280 --> 00:14:29,280 Yeah, for sure. 349 00:14:29,280 --> 00:14:32,880 And speaking of the human side of things, it's important to remember the passion behind 350 00:14:32,880 --> 00:14:33,880 all this. 351 00:14:33,880 --> 00:14:35,920 It's not just about the science, you know, it's about the people. 352 00:14:35,920 --> 00:14:36,920 Yeah. 353 00:14:36,920 --> 00:14:39,720 What makes people want to dedicate their lives to this? 354 00:14:39,720 --> 00:14:42,320 Exploring places they might never even get to see with their own eyes. 355 00:14:42,320 --> 00:14:48,840 Well, for a lot of them, it's that that curiosity, wanting to figure out our place in all of 356 00:14:48,840 --> 00:14:53,640 this, pushing the limits of what we know, contributing to something bigger, leaving 357 00:14:53,640 --> 00:14:55,480 their mark, you know, that's part of it. 358 00:14:55,480 --> 00:14:58,720 But it's also about like working together. 359 00:14:58,720 --> 00:15:04,720 These missions be all kinds of people together, scientists, engineers, technicians, all working 360 00:15:04,720 --> 00:15:06,440 towards a common goal. 361 00:15:06,440 --> 00:15:10,280 Like each person bringing their piece of the puzzle to make this amazing picture. 362 00:15:10,280 --> 00:15:11,280 Exactly. 363 00:15:11,280 --> 00:15:15,200 And when there's a big discovery, you know, those first pictures from a new world or finding 364 00:15:15,200 --> 00:15:18,280 proof of a hidden ocean, everyone gets to celebrate. 365 00:15:18,280 --> 00:15:22,440 It must be an incredible feeling knowing you were part of something so important. 366 00:15:22,440 --> 00:15:23,440 Pure joy. 367 00:15:23,440 --> 00:15:26,960 You're part of history, expanding our understanding of the universe. 368 00:15:26,960 --> 00:15:31,960 You've really shown us all the excitement and challenges and triumphs of exploring the 369 00:15:31,960 --> 00:15:35,200 outer solar system, a real journey of discovery. 370 00:15:35,200 --> 00:15:37,020 It's been great talking about it with you. 371 00:15:37,020 --> 00:15:39,860 Before we go, I want to leave our listeners with one thought. 372 00:15:39,860 --> 00:15:43,680 As we explore further, it's not just about getting to new places. 373 00:15:43,680 --> 00:15:48,320 It's about understanding where we fit in in all of this and inspiring others to keep 374 00:15:48,320 --> 00:15:49,720 exploring. 375 00:15:49,720 --> 00:15:53,400 We owe a lot to the people who came before us, you know, they dared to dream about these 376 00:15:53,400 --> 00:15:54,920 other worlds. 377 00:15:54,920 --> 00:15:59,280 And it's up to us to continue that, to keep learning and keep that spirit of exploration 378 00:15:59,280 --> 00:16:01,160 alive for the future. 379 00:16:01,160 --> 00:16:02,160 That's a great point. 380 00:16:02,160 --> 00:16:05,680 Well, that wraps up our deep dive into the outer planets. 381 00:16:05,680 --> 00:16:09,600 Don't forget to follow and subscribe to Cosmos in a Pod for more space adventures and check 382 00:16:09,600 --> 00:16:11,920 out our YouTube channel for amazing videos. 383 00:16:11,920 --> 00:16:32,320 Until next time, keep looking up.