Interstellar Comet 3i/Atlas, Lunar Myths Debunked, and the Mystery of Ancient Stars

0:00 Avery: Welcome to Astronomy Daily. I'm avery. Give

0:03 us 10 minutes and we'll give you the

0:04 universe.

0:05 Anna: And I'm Anna. It's great to be with you.

0:08 We've got a fascinating lineup today, from

0:11 an, um, update on our interstellar visitor

0:14 to a cosmic myth that just won't fade.

0:17 Avery: That's right. We'll also be touching on a

0:20 very public debate about our history on the

0:22 Moon and a discovery that challenges what we

0:25 thought we knew about the end of a star's

0:27 life.

0:28 So let's get started. First up, something for

0:31 all you stargazers out there. Our lead

0:34 story is an update about a visitor from

0:36 beyond our solar system, an interstellar

0:38 comet named 3i Atlas. Which is

0:41 putting on quite a show, right?

0:44 Anna: This isn't just any comet. It's

0:46 brightening much, much faster than anyone

0:49 predicted. As it gets closer to the sun, it's

0:52 becoming a real point of interest for both

0:54 professional and amateur astronomers.

0:57 Avery: Exactly. And it's not just its brightness. It

1:00 has this distinct blue color. What does that

1:02 tell us, Ann?

1:04 Anna: That color is a big clue about its

1:06 composition. The blue hue strongly

1:08 suggests significant gas emissions, likely

1:11 from volatile compounds like cyanogen and

1:14 ammonia ice sublimating, turning

1:16 directly from solid to gas as the Sun's

1:19 heat hits them. It's like the comet is

1:21 venting its ancient frozen materials into

1:24 space.

1:25 Avery: Fascinating. So we're essentially seeing the

1:28 chemical makeup of an object from another

1:30 star system. And we have some amazing

1:33 tools pointed at it, right?

1:35 Anna: Mm mhm. A whole fleet of solar monitoring

1:37 satellites are tracking it. We're talking

1:39 about stereo, A, SoHo, and even

1:42 the new GOES 19 weather satellite. They're

1:45 all being used to get different perspectives

1:47 and data on how the comet is behaving as it

1:50 heats up.

1:51 Avery: And the best part for our listeners who might

1:53 have a telescope sitting in their garage, is

1:55 that 3i Atlas is now bright enough to be

1:58 spotted with amateur equipment. So if you

2:00 know where to look, you can see an object

2:02 from another star with your own eyes.

2:05 Anna: And these different perspectives are crucial,

2:08 aren't they? Because this comet is on a

2:10 hyperbolic trajectory, meaning it's moving

2:12 too fast to be captured by our Sun's gravity.

2:15 It's a one time visitor zipping through our

2:17 neighborhood before heading back out into the

2:20 vastness of interstellar space.

2:22 Avery: That's what makes every piece of data so

2:24 precious. Unlike, uh, comets from our own

2:26 Oort cloud, which we can study again and

2:28 again, this is our only chance to

2:31 analyze the building blocks of another star

2:33 system up, uh, close. It's like a cosmic

2:36 probe sent to us from a distant unknown star.

2:39 Anna: It's a really exciting opportunity. These

2:42 interstellar visitors are rare, and one that

2:44 puts on a show like this is even rarer. A

2:47 great reason to dust off that telescope.

2:49 Avery: Speaking of things capturing public

2:50 attention, our next story shifts from the

2:53 outer reaches of the solar system to a debate

2:55 happening right here on Earth, centered on

2:58 our own moon.

2:59 Anna: This is a strange one. NASA recently had to

3:02 publicly respond to a claim made by Kim

3:04 Kardashian on her show. She stated that she

3:06 believes the 1969 moon landing was

3:09 fake.

3:10 Avery: It's a conspiracy theory that's been around

3:12 for decades, but it's always surprising when

3:15 it gets a platform of that size. What was her

3:17 reasoning?

3:18 Anna: She cited some heavily edited videos of

3:21 astronaut Buzz Aldrin where his words were

3:24 taken out of context to make it sound like he

3:26 was admitting it didn't happen. It's a

3:29 classic case of misinformation,

3:30 unfortunately. Mhm.

3:32 Avery: So how did NASA handle it? You don't often

3:35 see a government science agency getting into

3:37 a back and forth with a reality TV star.

3:40 Anna: They handled it with a lot of grace, I think.

3:42 The acting administrator, Sean Duffy, issued

3:45 a very clear statement. He didn't just

3:47 dismiss the claim, but reiterated the fact

3:50 that NASA has successfully landed humans on

3:52 the moon six times.

3:54 Avery: He also pointed to the mountains of physical

3:56 evidence. We have hundreds of kilograms

3:59 of lunar rocks that have been studied by

4:01 scientists worldwide. Their composition

4:04 is entirely different from Earth rocks.

4:07 Plus there are retroreflectors left on the

4:10 moon's surface by the Apollo missions that

4:12 observatories still use today to measure the

4:15 exact distance to the moon.

4:17 Anna: And he extended an invitation,

4:20 right?

4:20 Avery: He did. He invited Kardashian to the Kennedy

4:23 Space center to witness the launch of the

4:25 upcoming Artemis mission, which will be

4:27 sending astronauts back to the Moon. A sort

4:30 of come see for yourself gesture. It

4:33 was a firm but very classy way to counter the

4:36 misinformation. And turned it into a

4:38 teachable moment.

4:39 Anna: Exactly. And let's not forget the

4:42 independent verification. The Soviet Union,

4:45 America's chief rival in the space race,

4:47 was monitoring the Apollo missions. If the

4:50 landings were faked, they would have had

4:52 every incentive to expose it, and they

4:55 never did. The evidence is simply

4:58 overwhelming.

4:59 Avery: Absolutely. A good reminder of how important

5:02 it is to rely on primary sources and

5:04 scientific consensus. From celebrities

5:07 looking at the moon to scientists looking at

5:09 distant dying stars.

5:11 Our next story is a real head scratcher.

5:14 Anna: This one comes from the field of stellar

5:16 evolution. Astronomers have found something

5:18 that really shouldn't exist according to our

5:21 current models. It's an ancient White dwarf

5:24 star about 3 billion years old that's

5:26 still actively consuming the remains of its

5:29 own planet.

5:30 Avery: That's incredible. A white dwarf is a

5:33 dense core left over after a star like our

5:36 sun dies. The con thinking is that

5:39 any planetary cleanup process should be over

5:41 much, much sooner than 3 billion years.

5:44 Anna: Precisely. The star is called

5:46 LSPM J

5:47 M02073331,

5:51 and it's surrounded by a debris disk made of

5:54 shredded planetary material. This disk

5:57 is the oldest and most metal rich ever

5:59 observed around a star of this type. It's

6:02 like finding a dinosaur that's still alive

6:04 and eating.

6:06 Avery: So what's the theory? How is this still

6:08 happening after so long?

6:09 Anna: The leading hypothesis is that the planetary

6:12 system must have been disturbed relatively

6:14 recently. Something must have happened.

6:16 Perhaps a gravitational nudge from a

6:18 surviving outer planet that sent a rocky body

6:21 spiraling inwards towards the white dwarf,

6:24 where it got torn apart by the star's immense

6:26 gravity.

6:27 Avery: So it suggests that planetary systems can

6:30 remain dynamically active for billions of

6:33 years after their star has died. That's a

6:35 profound thought.

6:36 Anna: It's a chaotic process, but one that provides

6:39 a unique window. When this material falls

6:42 onto the white dwarf, Astronomers can analyze

6:44 its chemical signature using spectroscopy.

6:47 This tells them exactly what the shredded

6:49 planets were made of, whether they were rocky

6:52 like Earth, or rich in other elements.

6:55 It's like performing an autopsy on an

6:57 exoplanet.

6:58 Avery: So this discovery isn't just about one

7:01 strange old star. It gives us a

7:03 glimpse into the very, very distant future

7:06 of our own solar system. Billions of years

7:09 from now, after our sun becomes a white

7:11 dwarf, the remaining planets might get

7:13 jostled around, and Earth itself could

7:16 eventually be torn apart and consumed in a

7:19 similar fashion.

7:20 Anna: It really is. It forces us to

7:23 rethink the timelines for the late stages of

7:25 stellar evolution. It's a beautiful,

7:27 chaotic glimpse into the far future of, uh,

7:30 systems like our own.

7:31 Avery: That brings us back closer to home. We were

7:34 just talking about the Moon in a cultural

7:36 context. But our final story looks at a long

7:38 standing belief about its direct effect on

7:41 us, specifically on our sleep and our

7:44 behavior.

7:45 Anna: Right. The idea of the full Moon effect.

7:48 Many people swear they sleep worse or that

7:50 people act strangely during a full moon. We

7:53 spoke with a neurologist to get the

7:55 scientific take on this.

7:56 Avery: And what's the verdict? Is there any truth to

7:58 it?

7:59 Anna: There's a tiny kernel of truth when it comes

8:01 to sleep. Studies show that on average,

8:04 people get about 20 minutes less sleep on the

8:07 nights surrounding a full moon. But the

8:09 influence on mental health or behavior has

8:12 no scientific proof whatsoever.

8:15 Avery: Okay, so why the 20 minutes of lost

8:18 sleep? Is it gravity or something more

8:20 mysterious?

8:22 Anna: Nothing so mysterious. The most likely

8:25 culprit is simply light. A full Moon

8:28 is significantly brighter than any other

8:30 phase. And that extra light, especially

8:33 in pre industrial times, could be enough to

8:36 delay our body's internal clock and suppress

8:39 the production of the sleep hormone

8:41 melatonin.

8:42 Avery: That makes sense. And the behavioral stuff?

8:44 The idea that emergency rooms are busier

8:47 or people are more erratic.

8:49 Anna: It's an ancient belief, isn't it? The

8:52 word lunacy itself comes from luna, the

8:55 Latin word for Moon. For centuries, people

8:58 have tried to link human behavior to the

9:00 lunar cycle without any real evidence.

9:03 Avery: That's likely a psychological phenomenon

9:06 called illusory correlation. Our brains

9:09 are wired to find patterns, and we tend to

9:11 remember events that confirm our beliefs.

9:14 So if something odd happens during a full

9:16 Moon, we link the two while ignoring

9:19 all the odd things that happen when the Moon

9:21 isn't full.

9:23 Anna: That's right. And another common argument you

9:26 hear is about the Moon's gravitational pull

9:28 affecting the water in our bodies, just like

9:31 it causes ocean tides. But the neurologist

9:34 we spoke to completely debunked that.

9:36 The gravitational force of the Moon on a

9:39 person is miniscule, far less than

9:42 the force exerted by a large building you're

9:44 standing next to. It's simply not strong

9:47 enough to have any biological effect.

9:49 Avery: Right. And the neurologist also pointed out

9:52 that the impact of the Moon's light pales in

9:55 comparison to the artificial light we're

9:57 bathed in every night from our phones,

9:59 screens and streetlights.

10:01 Anna: Exactly. If you're worried about light

10:04 disrupting your sleep, the full Moon should

10:06 be the least of your concerns. It's a

10:09 fascinating myth, but one that science has

10:11 largely put to bed.

10:12 Avery: A perfect summary. And that's all the time we

10:15 have for today's deep dive into the cosmos,

10:17 from interstellar comets to ancient stars

10:20 and lunar myths.

10:22 Anna: Thanks for joining us, uh, on Astronomy

10:24 Daily. I'm Anna.

10:25 Avery: And I'm Avery. Join us next time as we

10:27 continue to explore the universe. Until then,

10:30 keep looking up.