Ep. 763: Interstellar Comets

Astronomy Cast

Science, Astronomy, Natural Sciences, Space

4.8 • 3.4K Ratings

🗓️ 15 September 2025

⏱️ 31 minutes

🔗️ Recording | iTunes | RSS

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Summary

Astronomy Cast Ep. 763: Interstellar Comets By Fraser Cain & Dr. Pamela Gay Streamed live Sep 8, 2025. Welcome to the first episode of our 19th season! This week we look at objects coming from other solar systems that come passing on by our Sun. During the summer hiatus the 3rd interstellar object was discovered: Comet 3I/ATLAS! So now we have 3 different interstellar interlopers to compare & contrast. What are we starting to learn about other star systems from this small sample size and how will our detection get even better? [Editor’s note: HiRISE’s telescope is 1/2 meter.]

Transcript

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0:00.0	I'm
0:02.0	Oh
0:03.0	Oh Thank you. I'm Astronomycast, Episode 763, interstellar Comets.
0:54.6	Welcome to Astronomycast for weekly facts-based journey through the cosmos,
0:57.6	we help you understand not only what we know, but how we know what we know.
1:00.9	I'm Fraser Kane. I'm the publisher of the universe today.
1:03.2	With me, as always, is Dr. Pam LaGay, a senior scientist for the Planetary Science Institute
1:07.7	and the director of Cosmox. Hey, Pam, how are you doing?
1:11.1	I am doing well. I figured out roughly our recording schedule for the year. And it looks like
1:20.7	episode 800 is going to either be the last episode of this year or the first episode of next year.
1:29.0	It depends on the, yeah, what happens?
1:30.4	Yeah, we're so close. And like, this is season 19.
1:36.1	It's season 19, okay, because I just lost track. I don't even care anymore what season
1:39.8	this is. I've, yeah, yeah, It's more than five.
1:45.5	Season 19.
1:46.1	Wow.
1:49.8	And have you seen all the new features that Patreon rolled out last week?
1:50.3	Mm-hmm.
1:55.4	So it's just sort of like new season, new us.
1:56.0	Yes.
1:58.7	And so I'm super excited. I am working on rolling out all the new features. And wow, I'm going to be busy this week.
2:05.1	Yeah, we've leaned hard into Patreon for Universe today. Essentially, I'm pushing all of the content there, all of our RSS feeds. The public feed goes there. The private feed goes there.
	...

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