1
00:00:00,000 --> 00:00:04,200
Welcome back to Cosmos in a Pod, Space and Astronomy Series Episode 4.

2
00:00:04,640 --> 00:00:10,080
Today we're diving into a realm that's fascinated us for centuries, exoplanets.

3
00:00:10,120 --> 00:00:12,640
Planets orbiting stars beyond our sun, right?

4
00:00:12,880 --> 00:00:14,960
A field that's just exploded in recent years.

5
00:00:15,360 --> 00:00:19,040
It's really remarkable how we've gone from just speculating about these distant

6
00:00:19,040 --> 00:00:21,520
worlds to actually finding and studying them.

7
00:00:21,560 --> 00:00:22,600
I know. It's incredible.

8
00:00:22,720 --> 00:00:28,120
Like when the first exoplanets were confirmed, it felt like sci-fi was becoming

9
00:00:28,120 --> 00:00:31,400
reality, but those early discoveries were just the beginning, right?

10
00:00:31,440 --> 00:00:32,320
Yeah, definitely.

11
00:00:32,320 --> 00:00:34,960
In 1992, the first confirmed exoplanets.

12
00:00:35,520 --> 00:00:36,720
They were orbiting a pulsar.

13
00:00:37,200 --> 00:00:39,160
That's a rapidly spinning dead star.

14
00:00:39,200 --> 00:00:39,440
Right.

15
00:00:39,440 --> 00:00:39,960
A pulsar.

16
00:00:40,160 --> 00:00:42,240
Definitely an unexpected place to find planets.

17
00:00:42,280 --> 00:00:44,960
It really challenged our understanding of planet formation.

18
00:00:45,040 --> 00:00:46,960
You know, like where could planets even form?

19
00:00:47,000 --> 00:00:47,400
Yeah.

20
00:00:47,680 --> 00:00:51,000
But that discovery, it was like a prelude to a much bigger one a

21
00:00:51,000 --> 00:00:52,000
few years later, wasn't it?

22
00:00:52,080 --> 00:00:52,880
Oh, absolutely.

23
00:00:52,880 --> 00:00:54,000
51 Pegasi b.

24
00:00:54,000 --> 00:00:54,520
Exactly.

25
00:00:54,520 --> 00:00:57,240
The first exoplanet found orbiting a sun-like star.

26
00:00:57,280 --> 00:00:57,960
That was huge.

27
00:00:57,960 --> 00:01:00,040
It basically launched this whole field of research.

28
00:01:00,280 --> 00:01:00,640
Yeah.

29
00:01:00,640 --> 00:01:05,240
It showed us that planets could exist around stars similar to our own, which meant,

30
00:01:05,240 --> 00:01:09,400
well, it raised the possibility that there could be other solar systems like ours out

31
00:01:09,400 --> 00:01:12,240
there, and the discoveries haven't stopped since.

32
00:01:12,280 --> 00:01:12,880
Seriously.

33
00:01:12,880 --> 00:01:15,560
It seems like every time I check the news, there's another exoplanet.

34
00:01:15,640 --> 00:01:15,920
Yeah.

35
00:01:16,160 --> 00:01:18,120
Thousands have been found already, right?

36
00:01:18,120 --> 00:01:18,560
Oh yeah.

37
00:01:18,560 --> 00:01:21,880
Over 5,000 confirmed exoplanets and counting.

38
00:01:22,120 --> 00:01:24,080
And the diversity is incredible.

39
00:01:24,080 --> 00:01:29,360
We're talking massive gas giants, rocky worlds, planets with these crazy short

40
00:01:29,360 --> 00:01:33,280
orbits and systems that look nothing like our own solar system.

41
00:01:33,440 --> 00:01:33,960
Wow.

42
00:01:34,680 --> 00:01:39,360
So we're finding all these different types of planets, but the big question, the one

43
00:01:39,360 --> 00:01:43,280
that keeps everyone on the edge of their seats is could any of these planets have life?

44
00:01:43,320 --> 00:01:43,880
Right.

45
00:01:44,080 --> 00:01:45,560
That's the ultimate question.

46
00:01:45,560 --> 00:01:50,440
The driving force for many exoplanet researchers, the search for life beyond Earth.

47
00:01:50,480 --> 00:01:52,960
To even start answering that though, we have to focus a bit.

48
00:01:52,960 --> 00:01:57,520
I mean, not all exoplanets are created equal when it comes to the possibility of life.

49
00:01:57,520 --> 00:01:58,040
Right, right.

50
00:01:58,040 --> 00:02:00,200
It's got to be, you know, the Goldilocks planets.

51
00:02:00,200 --> 00:02:03,680
Not too hot, not too cold, just right for liquid water, which is what the whole

52
00:02:03,680 --> 00:02:05,280
habitable zone thing is all about, isn't it?

53
00:02:05,280 --> 00:02:10,000
Yeah, the habitable zone, that sweet spot around a star where conditions are just

54
00:02:10,000 --> 00:02:12,480
right for liquid water to exist on the surface.

55
00:02:12,880 --> 00:02:17,600
Because at least as far as we know, liquid water is essential for life as we understand it.

56
00:02:17,640 --> 00:02:18,280
Absolutely.

57
00:02:18,280 --> 00:02:18,640
Yeah.

58
00:02:18,640 --> 00:02:21,920
And we've found some promising candidates in that habitable zone, haven't we?

59
00:02:22,000 --> 00:02:22,640
We have.

60
00:02:22,640 --> 00:02:24,680
There's Proxima Centauri B, for example.

61
00:02:24,840 --> 00:02:29,240
It's an Earth sized planet orbiting, get this, Proxima Centauri, the closest star to our

62
00:02:29,240 --> 00:02:32,400
own, and it's right in the middle of that habitable zone.

63
00:02:32,400 --> 00:02:37,600
Just imagine a planet that could potentially have life right in our cosmic backyard.

64
00:02:37,840 --> 00:02:39,400
It's almost too good to be true.

65
00:02:40,040 --> 00:02:44,240
But, you know, I was reading that Proxima Centauri B might not be the paradise planet

66
00:02:44,240 --> 00:02:45,240
we're hoping for.

67
00:02:45,480 --> 00:02:47,200
It orbits a red dwarf star.

68
00:02:47,240 --> 00:02:47,800
Yeah.

69
00:02:48,160 --> 00:02:51,400
Which are known to be pretty volatile, right?

70
00:02:51,440 --> 00:02:52,040
That's right.

71
00:02:52,040 --> 00:02:55,960
Red dwarf stars can have intense flares and radiation bursts.

72
00:02:56,360 --> 00:03:00,200
So Proxima Centauri B, even though it's technically in the habitable zone, it could

73
00:03:00,200 --> 00:03:02,000
have some really harsh conditions.

74
00:03:02,400 --> 00:03:06,400
Whether life, you know, life as we know it could survive there, well, it's still a big

75
00:03:06,400 --> 00:03:06,920
unknown.

76
00:03:06,920 --> 00:03:10,120
So maybe not the best spot for a second home then.

77
00:03:10,880 --> 00:03:13,480
But it's not the only potentially habitable planet, right?

78
00:03:13,640 --> 00:03:16,080
Wasn't there another system that really got people excited?

79
00:03:16,080 --> 00:03:18,120
No, you're talking about the TRAPPIST-1 system.

80
00:03:18,120 --> 00:03:19,080
Yeah, is that the one?

81
00:03:19,080 --> 00:03:20,400
No, that one's remarkable.

82
00:03:20,400 --> 00:03:25,560
We're talking about a single star with seven, yeah, count them, seven Earth-sized

83
00:03:25,560 --> 00:03:27,000
planets orbiting it.

84
00:03:27,000 --> 00:03:27,600
Seven.

85
00:03:28,320 --> 00:03:29,160
That's incredible.

86
00:03:29,160 --> 00:03:29,360
Yeah.

87
00:03:29,360 --> 00:03:33,800
What are the chances of finding that many planets around one star, little on Earth-sized

88
00:03:33,800 --> 00:03:34,120
ones?

89
00:03:34,320 --> 00:03:35,480
It's incredibly rare.

90
00:03:35,600 --> 00:03:37,640
But here's what makes it even more exciting.

91
00:03:38,160 --> 00:03:41,720
Three of those seven planets are within the habitable zone.

92
00:03:42,080 --> 00:03:48,640
So we could potentially have three planets all in one system capable of supporting life.

93
00:03:48,640 --> 00:03:50,720
That's almost too much to process.

94
00:03:50,720 --> 00:03:52,080
But hold on, how do we even know all this?

95
00:03:52,080 --> 00:03:53,480
I mean, these planets are light years away.

96
00:03:53,480 --> 00:03:56,040
It's not like we can just look through a telescope and see them, right?

97
00:03:56,040 --> 00:03:57,240
You're absolutely right.

98
00:03:57,440 --> 00:04:01,520
Directly observing exoplanets, extremely challenging.

99
00:04:01,520 --> 00:04:04,080
They're incredibly faint compared to their host stars.

100
00:04:04,280 --> 00:04:07,800
Think of it as like trying to spot a firefly next to a huge spotlight.

101
00:04:07,800 --> 00:04:08,560
Oh, wow.

102
00:04:08,560 --> 00:04:09,480
Yeah, that makes sense.

103
00:04:09,480 --> 00:04:10,840
So how do we even know they're there?

104
00:04:10,960 --> 00:04:12,040
It seems impossible.

105
00:04:12,240 --> 00:04:13,760
Well, astronomers are pretty clever.

106
00:04:13,760 --> 00:04:18,280
They've developed some really ingenious ways to indirectly detect and detect these

107
00:04:18,280 --> 00:04:19,280
distant worlds.

108
00:04:19,480 --> 00:04:23,760
Two of the most common methods are the transit method and the radial velocity method.

109
00:04:23,760 --> 00:04:24,880
OK, break those down for me.

110
00:04:24,880 --> 00:04:26,720
Let's start with the transit method.

111
00:04:26,720 --> 00:04:27,440
How does that work?

112
00:04:27,440 --> 00:04:32,320
OK, imagine you're looking at a streetlight and a tiny bug flies right in front of it.

113
00:04:32,320 --> 00:04:33,320
OK, I'm picturing it.

114
00:04:33,520 --> 00:04:36,880
You probably notice a slight dip in the light's brightness, right?

115
00:04:36,880 --> 00:04:37,080
Yeah.

116
00:04:37,080 --> 00:04:38,320
As the bug passes by.

117
00:04:38,920 --> 00:04:40,920
The transit method works in a similar way.

118
00:04:41,520 --> 00:04:47,040
When a planet passes in front of its star, from our view here on Earth, it causes a tiny

119
00:04:47,040 --> 00:04:50,320
but detectable dip in the star's light.

120
00:04:50,520 --> 00:04:55,480
So by measuring these tiny dips in starlight, astronomers can figure out if there's a

121
00:04:55,480 --> 00:04:56,840
planet orbiting that star.

122
00:04:56,840 --> 00:04:57,680
That's incredible.

123
00:04:57,680 --> 00:04:58,280
Exactly.

124
00:04:58,280 --> 00:05:03,280
Not only can they confirm a planet's existence, they can also determine its size, its orbital

125
00:05:03,280 --> 00:05:08,160
period, even get some clues about its atmosphere based on how the light changes as it passes

126
00:05:08,160 --> 00:05:08,680
through.

127
00:05:08,680 --> 00:05:09,800
Wow, that's amazing.

128
00:05:10,000 --> 00:05:11,680
What about the radial velocity method?

129
00:05:11,680 --> 00:05:12,520
How does that one work?

130
00:05:12,520 --> 00:05:17,720
This one uses the subtle gravitational dance between a star and its planet.

131
00:05:17,920 --> 00:05:22,920
Basically, a planet's gravity tugs on its host star, causing the star to wobble ever

132
00:05:22,920 --> 00:05:23,720
so slightly.

133
00:05:23,720 --> 00:05:25,120
Like a cosmic tug of war.

134
00:05:25,320 --> 00:05:26,920
Perfect analogy.

135
00:05:27,120 --> 00:05:32,120
And by analyzing the star's light spectrum, astronomers can detect this wobble.

136
00:05:32,320 --> 00:05:35,920
The amount of wobble tells us about the planet's mass and its orbit.

137
00:05:36,120 --> 00:05:40,920
OK, so we can figure out a planet's size and mass using these indirect methods that

138
00:05:40,920 --> 00:05:42,720
are impressive.

139
00:05:42,920 --> 00:05:46,520
But what about learning what's actually on these planets, like their atmospheres?

140
00:05:46,720 --> 00:05:49,320
Ah, now that's where things get even more interesting.

141
00:05:49,520 --> 00:05:53,720
When a planet transits its star, some of the starlight actually filters through the

142
00:05:53,720 --> 00:05:54,720
planet's atmosphere.

143
00:05:54,920 --> 00:05:58,520
It's like imagine shining a flashlight through colored glass.

144
00:05:58,720 --> 00:05:59,120
Oh, yeah.

145
00:05:59,320 --> 00:06:00,920
The glass changes the color of the light.

146
00:06:01,120 --> 00:06:01,520
Right.

147
00:06:01,720 --> 00:06:05,120
Similarly, a planet's atmosphere can leave its fingerprints on the starlight.

148
00:06:05,320 --> 00:06:09,320
So by analyzing that filtered starlight, we can actually figure out what the planet's

149
00:06:09,320 --> 00:06:10,520
atmosphere is made of.

150
00:06:10,520 --> 00:06:11,520
Exactly.

151
00:06:11,720 --> 00:06:16,120
Scientists can identify specific chemical signatures in the starlight that indicate

152
00:06:16,120 --> 00:06:20,920
the presence of things like, oh, water vapor, carbon dioxide, methane, and even oxygen.

153
00:06:21,120 --> 00:06:24,120
These chemical clues, we call them biosignatures.

154
00:06:24,320 --> 00:06:24,920
Biosignatures.

155
00:06:24,920 --> 00:06:25,720
That's a great term.

156
00:06:25,920 --> 00:06:29,920
So these are like chemical hints that could tell us if a planet might have life on it,

157
00:06:30,120 --> 00:06:31,520
like a message from another world.

158
00:06:31,720 --> 00:06:33,120
It really is like that.

159
00:06:33,320 --> 00:06:37,920
And with new powerful telescopes like the James Webb Space Telescope, we can now study

160
00:06:37,920 --> 00:06:40,520
exoplanet atmospheres in incredible detail.

161
00:06:40,720 --> 00:06:43,920
It's totally revolutionizing our search for life beyond Earth.

162
00:06:44,120 --> 00:06:45,720
This is all so incredible.

163
00:06:45,920 --> 00:06:49,520
It feels like we're right on the verge of unlocking some of the universe's biggest

164
00:06:49,520 --> 00:06:50,120
secrets.

165
00:06:50,320 --> 00:06:54,720
But, you know, before we dive even deeper into that search for life, let's take a moment

166
00:06:54,920 --> 00:06:59,920
to think about what these biosignatures might be telling us and what it all means for our

167
00:06:59,920 --> 00:07:01,520
understanding of life itself.

168
00:07:01,720 --> 00:07:02,320
And welcome back.

169
00:07:02,520 --> 00:07:06,320
We were talking about biosignatures, those chemical hints that could point to life on

170
00:07:06,320 --> 00:07:07,120
other planets.

171
00:07:07,120 --> 00:07:08,320
Really fascinating stuff.

172
00:07:08,520 --> 00:07:09,720
Yeah, they got me thinking.

173
00:07:09,920 --> 00:07:15,320
It's amazing that we could detect signs of life light years away just by analyzing starlight.

174
00:07:15,520 --> 00:07:19,720
But are we limiting ourselves by looking for life as we know it?

175
00:07:19,920 --> 00:07:22,920
That's a great question and a big debate right now in science.

176
00:07:23,120 --> 00:07:25,920
Our search is naturally biased toward what we're familiar with.

177
00:07:26,120 --> 00:07:26,320
Right.

178
00:07:26,520 --> 00:07:29,920
Carbon-based life needs water, you know, like Earth.

179
00:07:30,120 --> 00:07:32,720
Exactly, because it's the only life we've ever found.

180
00:07:32,920 --> 00:07:36,720
But imagine life on other planets evolved under totally different conditions.

181
00:07:36,720 --> 00:07:37,920
What if it's not carbon-based?

182
00:07:38,120 --> 00:07:38,320
Yeah.

183
00:07:38,520 --> 00:07:41,320
What if it thrives in environments we think of as extreme?

184
00:07:41,520 --> 00:07:41,920
Exactly.

185
00:07:42,120 --> 00:07:47,520
Picture a planet with oceans of liquid methane instead of water or organisms that love

186
00:07:47,720 --> 00:07:50,520
scorching heat or intense radiation.

187
00:07:50,720 --> 00:07:53,320
Life could take forms we can't even imagine.

188
00:07:53,520 --> 00:07:54,520
It's mind-blowing.

189
00:07:54,720 --> 00:07:58,320
We could be missing out on totally new kinds of life because we're so focused on finding

190
00:07:58,520 --> 00:07:59,720
something like us out there.

191
00:07:59,920 --> 00:08:00,520
Right.

192
00:08:00,720 --> 00:08:03,120
And that's why studying exoplanets is so important.

193
00:08:03,120 --> 00:08:06,920
It forces us to broaden our view, to rethink what life even means.

194
00:08:07,120 --> 00:08:09,120
It's like we're redefining life itself.

195
00:08:09,320 --> 00:08:11,720
It's humbling and exciting at the same time.

196
00:08:11,920 --> 00:08:14,920
But let's get back to the search for life, even if it is familiar.

197
00:08:15,120 --> 00:08:18,720
What happens if we find evidence of life on an exoplanet?

198
00:08:18,920 --> 00:08:19,920
What would that mean?

199
00:08:20,120 --> 00:08:22,320
Even finding microbial life would be huge.

200
00:08:22,520 --> 00:08:27,720
It would mean Earth isn't unique in having life, that the universe is teeming with potential for life.

201
00:08:27,920 --> 00:08:28,920
It would change everything.

202
00:08:29,120 --> 00:08:31,920
Our whole view of our place in the cosmos would shift.

203
00:08:31,920 --> 00:08:34,720
A complete paradigm shift for humanity.

204
00:08:34,920 --> 00:08:41,520
Philosophical debates, theological discussions, and a whole new wave of scientific exploration.

205
00:08:41,720 --> 00:08:43,920
But what if we keep searching and find nothing?

206
00:08:44,120 --> 00:08:47,520
What if Earth really is alone in a vast, sterile universe?

207
00:08:47,720 --> 00:08:48,920
That's kind of a scary thought.

208
00:08:49,120 --> 00:08:50,720
It is a possibility.

209
00:08:50,920 --> 00:08:53,720
And while disappointing at first, it would also raise some big questions.

210
00:08:53,920 --> 00:08:55,520
Why is Earth so special?

211
00:08:55,720 --> 00:08:57,520
How rare is intelligent life?

212
00:08:57,720 --> 00:09:00,520
It deepens the mystery of our existence.

213
00:09:00,520 --> 00:09:04,320
So it's like either answer, finding life or not, leads to more questions.

214
00:09:04,520 --> 00:09:07,920
Like peeling back layers of an onion, there's always another layer underneath.

215
00:09:08,120 --> 00:09:09,120
That's science.

216
00:09:09,320 --> 00:09:11,120
Every discovery opens up new questions.

217
00:09:11,320 --> 00:09:13,720
We may never have all the answers, but the search is what drives us.

218
00:09:13,920 --> 00:09:14,920
I love that.

219
00:09:15,120 --> 00:09:17,920
The journey matters just as much as the destination.

220
00:09:18,120 --> 00:09:22,920
Speaking of, we've talked about the challenges and the incredible potential of exoplanet research.

221
00:09:23,120 --> 00:09:24,120
But what's next?

222
00:09:24,320 --> 00:09:29,320
Well, we've found over 5,000 exoplanets, but that's probably just a tiny fraction of what's out there.

223
00:09:29,320 --> 00:09:34,920
Technology is advancing, so we'll detect even smaller planets, fainter ones, maybe even more Earth-like.

224
00:09:35,120 --> 00:09:39,920
And with telescopes like James Webb, we're getting such detailed looks at exoplanet atmospheres

225
00:09:40,120 --> 00:09:42,920
so we can analyze those biosignatures even better.

226
00:09:43,120 --> 00:09:47,920
Right. We might even find signs of active biological processes on other worlds.

227
00:09:48,120 --> 00:09:49,920
Wow. It's incredible that we can do this.

228
00:09:50,120 --> 00:09:54,120
To study atmospheres light years away and maybe find evidence of life.

229
00:09:54,320 --> 00:09:55,920
It's science fiction coming true.

230
00:09:56,120 --> 00:09:57,920
It really shows human ingenuity.

231
00:09:57,920 --> 00:10:01,520
Our endless curiosity to understand the universe and our place in it.

232
00:10:01,720 --> 00:10:02,720
Absolutely.

233
00:10:02,920 --> 00:10:08,920
But besides the search for life, studying exoplanets is helping us answer big questions about how planets form,

234
00:10:09,120 --> 00:10:12,920
how star systems evolve, and just the amazing variety of worlds out there.

235
00:10:13,120 --> 00:10:16,320
We're always learning new things, challenging what we thought we knew,

236
00:10:16,520 --> 00:10:18,520
expanding our understanding of the cosmos.

237
00:10:18,720 --> 00:10:20,720
You know, we've focused a lot on the science,

238
00:10:20,920 --> 00:10:23,720
but there's also the wonder that exoplanets inspire, right?

239
00:10:23,920 --> 00:10:25,920
Definitely. Just imagine out there,

240
00:10:25,920 --> 00:10:30,920
billions of stars, and some might have planets with oceans, continents,

241
00:10:31,120 --> 00:10:35,120
maybe even civilizations looking up at their sky wondering if they're alone too.

242
00:10:35,320 --> 00:10:37,320
It's both humbling and exciting.

243
00:10:37,520 --> 00:10:40,520
It makes you realize how vast and mysterious the universe is.

244
00:10:40,720 --> 00:10:42,720
And how much more there is to discover.

245
00:10:42,920 --> 00:10:45,320
Okay. As we wrap up this part of our deep dive,

246
00:10:45,520 --> 00:10:48,120
what are the key takeaways you want listeners to remember?

247
00:10:48,320 --> 00:10:50,920
First, we're not alone in terms of planetary systems.

248
00:10:51,120 --> 00:10:52,520
Planets are everywhere.

249
00:10:52,720 --> 00:10:54,520
And they're all around us.

250
00:10:54,520 --> 00:10:55,920
They're everywhere.

251
00:10:56,120 --> 00:10:59,120
And the diversity we're seeing is beyond anything we could imagine.

252
00:10:59,320 --> 00:11:01,120
And that within this vastness,

253
00:11:01,320 --> 00:11:05,320
there are planets that might be like Earth, with life as we know it,

254
00:11:05,520 --> 00:11:07,920
or maybe life as we haven't even dreamed of yet.

255
00:11:08,120 --> 00:11:08,920
Exactly.

256
00:11:09,120 --> 00:11:13,520
Exoplanet research is changing how we see life, the universe, and ourselves.

257
00:11:13,720 --> 00:11:14,920
And it's just the beginning.

258
00:11:15,120 --> 00:11:18,120
New discoveries are happening all the time, pushing the limits of our knowledge.

259
00:11:18,320 --> 00:11:19,520
Yeah, it's mind-blowing.

260
00:11:19,720 --> 00:11:21,520
It really feels like a new era of discovery.

261
00:11:21,720 --> 00:11:23,120
Who knows what's coming next?

262
00:11:23,120 --> 00:11:26,320
Oh, the future of exoplanet research is wide open.

263
00:11:26,520 --> 00:11:28,320
We've got new missions being planned.

264
00:11:28,520 --> 00:11:30,120
Telescopes are getting more powerful.

265
00:11:30,320 --> 00:11:34,320
And scientists, well, they're coming up with even more creative ways

266
00:11:34,520 --> 00:11:35,920
to study these distant worlds.

267
00:11:36,120 --> 00:11:37,320
We're really just getting started.

268
00:11:37,520 --> 00:11:40,720
So for our listeners who want to learn more, what would you recommend?

269
00:11:40,920 --> 00:11:42,720
How can they dive deeper into all this?

270
00:11:42,920 --> 00:11:44,320
Just stay curious.

271
00:11:44,520 --> 00:11:45,920
There's so much out there, you know.

272
00:11:46,120 --> 00:11:47,520
Online articles, videos.

273
00:11:47,720 --> 00:11:49,920
There are even citizen science projects

274
00:11:50,120 --> 00:11:52,720
where you can help analyze real data from exoplanets.

275
00:11:52,720 --> 00:11:53,920
Oh, wow. That's awesome.

276
00:11:54,120 --> 00:11:57,520
Getting hands-on with the science is the best way to really appreciate it all.

277
00:11:57,720 --> 00:12:00,320
Absolutely. And of course, don't forget to look up at the night sky.

278
00:12:00,520 --> 00:12:03,920
Every star you see could have planets orbiting it.

279
00:12:04,120 --> 00:12:05,320
It's a humbling thought.

280
00:12:05,520 --> 00:12:06,920
We're part of something much bigger.

281
00:12:07,120 --> 00:12:08,120
Much bigger, yeah.

282
00:12:08,320 --> 00:12:09,720
Well, I think we've covered a lot today.

283
00:12:09,920 --> 00:12:13,120
Those early discoveries, the sheer variety of planets,

284
00:12:13,320 --> 00:12:15,520
the possibility of life beyond Earth.

285
00:12:15,720 --> 00:12:17,120
It's been quite a journey.

286
00:12:17,320 --> 00:12:19,320
It really has. I hope our listeners enjoyed it.

287
00:12:19,520 --> 00:12:20,520
I'm sure they did.

288
00:12:20,720 --> 00:12:22,120
To all our listeners out there,

289
00:12:22,120 --> 00:12:25,520
if this deep dive into exoplanets has sparked your curiosity,

290
00:12:25,720 --> 00:12:28,520
be sure to follow and subscribe to Cosmos in a Pot

291
00:12:28,720 --> 00:12:30,520
for more explorations of the universe.

292
00:12:30,520 --> 00:12:59,120
Until next time, keep looking up and keep exploring.