Cosmic Fireworks, Mars Meets Uranus, and the Dawn of a New Era in Astronomy

0:00 Anna: Welcome to Astronomy Daily, your source for

0:02 the latest space and astronomy news. I'm

0:05 Anna.

0:06 Avery: And I'm, um, avery. It's Saturday, July 4,

0:08 2026. Happy Independence Day to everyone

0:11 celebrating today.

0:12 And welcome to our weekend space and

0:15 astronomy news wrap.

0:16 Anna: That means we're doing things a little

0:18 differently today. We've got four of the

0:21 biggest stories from the past five days, plus

0:23 two brand new stories to keep things fresh.

0:26 Avery: And what a week it's been. We've got a rescue

0:28 mission that finally got off the ground, a

0:31 telescope in Chile that just changed the game

0:33 for astronomy. A, ah, geomagnetic storm

0:36 timed perfectly for the holiday weekend, and

0:39 a very close encounter between Mars and

0:41 Uranus happening literally today.

0:44 Anna: Plus, uh, NASA's given us the perfect Fourth

0:47 of July present. Cosmic fireworks

0:49 courtesy of the James Webb Space Telescope.

0:52 Avery: Let's get into it.

0:53 Anna: Let's start with the story we've been

0:55 following all week. And finally some good

0:58 news. The Swift Boost mission has

1:00 finally successfully launched.

1:02 Avery: After weather scrubs and then that software

1:05 navigation issue that aborted Thursday's

1:07 attempt, Catalyst Space's Link

1:10 spacecraft got away clean Early Friday

1:12 morning, 4:36am Eastern Time

1:16 on a Northrop Grumman Pegasus XL

1:18 rocket release from the Stargazer aircraft

1:21 over Kwajalein Atoll in the Marshall Islands.

1:24 Anna: And there's a bit of history in this launch

1:26 too. That was the very last flight of

1:29 the Pegasus rocket. Full stop. End of an

1:32 era for that vehicle.

1:33 Avery: It really is now. Link isn't just going to

1:36 zip up and grab Swift straight away. It's got

1:39 two to three weeks of careful observation

1:41 ahead of it, sizing up the observatory to

1:44 find the best spot to grapple onto it.

1:46 Anna: Right. Swift, uh, wasn't built to be

1:48 serviced, so this is delicate work. Once

1:51 Link picks its grab point and secures Swift

1:54 with its three robotic arms, it'll fire up

1:57 gentle ion thrusters and spend several months

2:00 slowly raising the pair back to a safe orbit.

2:03 Avery: If it works, it'll be the first time a

2:05 commercial spacecraft has ever captured a

2:08 government satellite that was never designed

2:10 to docking. No pressure, Link.

2:13 Anna: After the week it's had just getting off the

2:15 ground, I, uh, think it's earned a little

2:16 confidence. We'll keep tracking this one as

2:19 it approaches Swift in the coming weeks.

2:21 Avery: Story two is genuinely one of the biggest

2:24 moments in astronomy. This year. The Vera C.

2:27 Rubin Observatory in Chile has officially

2:29 begun its 10 year legacy survey of space and

2:32 time.

2:33 Anna: This has been three decades in the making.

2:36 Rubin sits atop Cerro Pachon and

2:39 it's using the largest digital camera ever

2:42 built. 3200

2:44 megapixels to photograph the entire

2:47 southern sky every few nights.

2:49 Avery: Every single image captures a patch of sky

2:51 about 45 full moons wide, and the

2:54 camera snaps a new one roughly every 40

2:57 seconds. Over 10 years, it's expected

2:59 to catalog around 17 billion

3:02 stars and 20 billion galaxies.

3:05 Anna: And because it's revisiting the same patches

3:07 of sky over and over, it'll build up what

3:10 astronomers are calling a time lapse movie of

3:13 the universe, catching supernovae,

3:15 asteroids, and anything else that moves,

3:18 brightens, or fades practically as it

3:20 happens.

3:21 Avery: One of the project leads called it the end of

3:23 a 30 year wait. And for anyone down here in

3:26 the Southern Hemisphere, it's worth

3:28 remembering. This is very much our sky.

3:31 Anna: Rubin's watching a proud moment for Chile

3:33 and for astronomy generally. This is going to

3:36 keep producing headlines for a decade.

3:39 Next up, if you've been outside the last

3:42 couple of nights, you might already know

3:44 about this one. That x1.1

3:47 solar flare from earlier in the week has

3:49 triggered a, uh, proper geomagnetic storm.

3:52 Avery: NOAA Space Weather Prediction center has

3:55 forecasted G2 to possibly G3

3:57 class storming across July 3rd and into

4:00 today July 4th, thanks to a series of

4:03 coronal mass ejections arriving in close

4:05 succession in the Northern Hemisphere.

4:08 Anna: That's put the aurora view line unusually

4:11 far south parts of Montana, North

4:13 Dakota, Minnesota, even as far as

4:16 Kansas or Maryland if things get feisty.

4:19 Avery: And for us in the Southern Hemisphere, storms

4:21 of this strength can bring the aurora, uh,

4:23 Australis into view, too. Worth keeping an

4:26 eye on the southern horizon tonight if you're

4:28 away from city lights.

4:30 Anna: Just a reminder, the key thing to watch is

4:32 the BZ component of the interplanetary

4:35 magnetic field. When it swings south,

4:37 that's when the show really gets going.

4:40 Avery: So tonight might just serve up fireworks in

4:43 the sky as well as on the ground. Not a bad

4:45 way to spend Independence Day if you're one

4:47 for celebrating. Story four is a quick recap

4:50 for anyone who missed Friday's episode

4:52 because it's too big a story.

4:54 Not to mention, in a weekly wrap,

4:56 Anna: astronomers led by A team at UH UC Irvine

4:59 have confirmed

5:00 GJ3378b,

5:03 a super Earth orbiting a small red dwarf

5:06 just 25 light years from us, sitting right in

5:09 the star's habitable zone.

5:11 Avery: It's got a minimum mass a bit over twice

5:14 Earth's, and it receives almost the same

5:16 amount of starlight we do. That's about as

5:18 close to an Earth analog as these things get

5:21 in terms of energy balance.

5:23 Anna: The next step is figuring out whether it

5:25 actually has an atmosphere. That's what would

5:27 let scientists start hunting for

5:29 biosignatures or liquid water. But

5:32 even without that confirmation yet, it's a

5:34 genuinely exciting addition to the short list

5:37 of nearby potentially habitable worlds.

5:40 Avery: One of the researchers put it nicely. The

5:43 line between habitability and desolation

5:46 might be thinner than we think.

5:48 We'll be watching for follow up observations

5:51 Anna: now for one of our fresh news stories today.

5:53 And it's got perfect timing. NASA has

5:56 released a brand new James Webb image just

5:59 in time for America's 250th

6:01 birthday.

6:02 Avery: This one shows the FS TAO system about

6:05 450 light years away in Taurus, and

6:08 it is dripping with what NASA itself is

6:10 calling cosmic fireworks. Background

6:13 galaxies bursting into view and the cluster

6:15 of young protostars lighting up the frame.

6:18 Anna: The protostars themselves are only 1 to

6:21 3 million years old babies in star

6:24 terms. One of them, Fstau B, is

6:27 throwing off outflows of gas and dust that

6:29 have carved these striking light blue ridges

6:32 into the surrounding cloud.

6:34 Avery: Those ridges show up because the outflows

6:36 compress the material and it starts

6:38 reflecting light from the nearby protostar.

6:41 Basically, the baby star is redecorating its

6:43 nursery on its way out the door.

6:45 Anna: It's a gorgeous image and a lovely bit of

6:48 cosmic timing from NASA. Infant stars

6:51 asserting their independence released right

6:53 on America's 250th.

6:55 Avery: We'll have the image linked in the show notes

6:57 so you can see it for yourself. It's worth a

6:59 look.

7:00 And in other news today, a ah, genuine sky

7:03 watching event happening right now. Mars and

7:06 Uranus are as close together in our sky as

7:08 they've been in decades.

7:10 Anna: The closest approach is calculated for around

7:13 6am UTC today, July 4,

7:16 when the two planets will be separated by

7:18 only about 6 arcminutes. For comparison,

7:21 that's roughly half the separation between

7:23 Mizar and Alcor in the Big Dipple's handle.

7:26 Avery: Mars is easy. A uh, steady reddish point low

7:29 in the east northeast before dawn, sitting

7:32 between the Pleiades and Hyades star

7:34 clusters. Uranus is the hard part since it's

7:37 about 60 times fainter.

7:39 Anna: The trick is to use Mars as your guide star

7:42 point binoculars or a small scope at Mars,

7:44 then look just above it for a tiny greenish

7:47 dot. That's Uranus.

7:49 Avery: Best viewing is around 3:30-4:00am

7:52 local time wherever you are with a clear

7:54 eastern horizon. And because this is a sky

7:57 events rather than a location specific one,

7:59 it's visible from both hemispheres. So this

8:02 one's for everybody wherever you're

8:04 Anna: listening from a lovely quiet way to

8:06 bookend a day that's going to be full of

8:08 noise and fireworks for a lot of our

8:10 listeners.

8:12 Avery: That wraps up this week's Astronomy Daily

8:14 weekend wrap. A rescue mission finally

8:16 underway, a new era of sky surveying

8:19 begun, an aurora show on offer, a

8:21 promising new world next door, and two fresh

8:24 stories bookending Independence Day with

8:26 fireworks both cosmic and real.

8:29 Anna: Whatever you're doing today, we hope you get

8:32 a clear sky tonight, whether you're watching

8:34 for aurora, hunting down Uranus next to

8:37 Mars, or just enjoying the fireworks down

8:40 here on Earth.

8:41 Avery: I'm, um, Avery.

8:42 Anna: And I'm Anna. Thanks for listening to

8:44 Astronomy Daily. Clear skies, everyone.

8:47 And happy 4th of July to our North American

8:49 listeners. Mhm.

9:07 You stories

9:10 we told.