Cosmic Signals: Record-Breaking FRB Discovery

0:00 Anna: Welcome to Astronomy Daily, your go to

0:02 podcast for all things space and astronomy

0:05 news. I'm Anna.

0:07 Avery: And I'm Avery. We're so glad you're joining

0:10 us today for another exciting dive into the

0:12 cosmos.

0:13 Anna: Today we'll be talking about a new record

0:15 in detecting incredibly distant signals

0:18 from the early universe.

0:21 Avery: Plus, we'll check in on a fascinating

0:23 planetary mission that just completed a

0:25 crucial test near Mars, giving us a

0:28 sneak peek at its capabilities. And get ready

0:31 to hear about a mysterious visitor from

0:33 beyond our solar system, captured for the

0:36 first time by none other than the Hubble

0:38 Space Telescope. To top it all off, we'll

0:41 give you a rundown of a very busy week ahead

0:44 in space launches featuring everything from

0:46 Vulcan and Ariane 6 to multiple

0:49 Starlink missions. Let's get started.

0:52 Anna: Alright, let's kick things off with a truly

0:55 groundbreaking discovery that's pushing the

0:57 boundaries of our understanding of the early

0:59 universe. Astronomers have traced a

1:02 fast radio burst, or frb, to

1:05 a record breaking distance across the cosmos.

1:08 This new FRB, designated

1:10 FRB

1:11 20240304B,

1:14 was initially detected on March 4,

1:17 2024 by the MeerKAT Radio Telescope

1:20 Array in South Africa. But what makes this

1:23 one so special is its incredible distance.

1:27 Avery: That's right, it has a redshift of

1:29 2.148, which means we're looking at

1:32 light that traveled for over 11 billion years

1:35 to reach Earth. To put that in perspective,

1:37 this burst originated just 3 billion years

1:40 after the Big Bang, pushing our

1:43 observational boundary of FRBs much

1:45 further back into cosmic time. Previous

1:48 detections only reached about halfway through

1:51 cosmic history.

1:53 Anna: That's right, finding the exact source of

1:55 this signal was a real piece of detective

1:57 work. Initially, ground based observatories

2:00 and archival data couldn't pinpoint its host

2:03 galaxy. But a follow up with the James Webb

2:06 Space Telescope's NIRCAM and NIRSPEC

2:08 instruments did the trick, revealing the

2:10 FRB's host galaxy and getting a

2:13 spectroscopic redshift. The burst's radio

2:16 waves dispersed at a rate of about

2:18 2,330 parsecs per

2:21 cubic centimeter, acting like a cosmic

2:23 fingerprint that confirmed its extremely

2:26 distant origin. This measurement tells

2:29 us how much the signal was stretched and

2:31 delayed by free electrons as it journeyed

2:34 through space. The host galaxy itself is

2:36 quite revealing. It's described as a low

2:39 mass clumpy galaxy that's still

2:41 relatively young and actively forming stars.

2:44 The presence of an FRB in such a galaxy

2:47 strongly supports the theory that these

2:49 mysterious bursts originate from young

2:52 magnetars, which are highly magnet Magnetized

2:55 neutron stars. This suggests an origin

2:57 that can occur over relatively short

2:59 timescales, Rather than processes that take

3:02 billions of years to develop.

3:04 Avery: This discovery Effectively doubles the

3:07 redshift reach of localized FRBs,

3:10 allowing us to probe ionized baryons across

3:13 about 80% of the universe's history.

3:16 It also establishes FRB activity

3:19 During what astronomers call cosmic noon,

3:21 which was the peak period of star formation

3:24 in the universe's history.

3:26 Anna: It's fascinating how these millisecond long

3:28 bursts can encode so much information about

3:31 the plasma Permeating our universe, Giving us

3:34 insights into magnetic fields and gas

3:36 distributions. The observations also

3:38 reveal Complex magnetic field structures

3:41 Spanning gigaparsec scales along the

3:44 burst's sightline as it passed through

3:46 various cosmic structures.

3:48 Avery: As next generation telescopes come online,

3:51 discoveries like FRB2024

3:54 0304B are trul

3:57 exciting. They show us how these fleeting

4:00 signals can act as messengers from the

4:02 universe's distant past, Helping us piece

4:05 together how it evolved from its chaotic

4:07 youth into the structured cosmos we see

4:10 today. It's just incredible.

4:13 Anna: From exploring the distant past with FRBs,

4:16 let's now turn our attention to an upcoming

4:19 mission that's preparing to unlock the

4:21 secrets of one of Jupiter's most intriguing

4:23 moons. NASA's Europa Clipper mission, which

4:26 began its long journey to Europa on October

4:29 14, 2024, recently had

4:32 a crucial pit stop. On March 1, the

4:35 probe reached Mars not just for a gravity

4:38 assist maneuver, but also to perform a

4:41 vital test While orbiting the Red

4:44 planet. Mission controllers on Earth Seized

4:47 the opportunity to test the probe's ReSight

4:50 instrument. ReSight stands for

4:52 Radar for Europa Assessment and

4:55 Sounding Ocean to Near surface.

4:58 Avery: This radar instrument Is absolutely critical

5:01 for the mission's primary goal to probe

5:03 beneath Europa's icy sheet and search for

5:06 pockets of water that could potentially

5:08 harbor life. It's also designed to give

5:10 scientists A, uh, glimpse Of Europa's

5:12 interior ocean and shed light on how

5:15 material Might be transferred from the

5:17 interior to the surface.

5:19 Anna: The test was a complete success, Producing

5:22 a radargram that showed the outline Of Mars

5:25 topography. This gave the team A

5:27 fantastic preview of what the probe Will see

5:30 When it arrives at Europa. REASON relies

5:33 on two pairs of antennas that extend

5:36 from the spacecraft's massive solar arrays,

5:39 measuring an impressive

5:41 17.6 meters from tip to

5:44 tip.

5:45 Avery: Testing this instrument in space Was crucial,

5:47 Because certain aspects, like the echo test,

5:50 where the radar signals bounce back, Simply

5:53 couldn't be performed on earth Once the

5:55 actual hardware was built. Dom Blankenship,

5:58 the principal investigator for the radar

6:00 instrument, said, we got everything out of

6:02 the flyby that we dreamed the goal was

6:05 to determine the radar's readiness for the

6:07 Europa mission. And it worked. Every part of

6:10 the instrument proved itself to do exactly

6:12 what we intended.

6:13 Anna: During the test, Reason sent and received

6:16 radio waves for about 40 minutes while

6:19 the spacecraft flew about 5,000

6:22 kilometers above Mars surface,

6:24 gradually lowering to 884

6:27 kilometers. For comparison, once it's

6:30 at Europa, REASON will operate when the

6:32 Clipper is as close as 25km

6:35 to the moon's surface.

6:37 Avery: The instrument team collected a staggering 60

6:40 gigabytes of rich data, which they started

6:43 transmitting back to Earth in mid May.

6:45 Scientists have been poring over this data,

6:47 and it has confirmed that REASON is in

6:50 perfect working order. Trina Ray,

6:52 Europa Clipper's deputy science manager,

6:55 shared the excitement, saying that all of us

6:57 who had worked so hard to make this test

6:59 happen and the scientists seeing the data for

7:02 the first time were ecstatic, saying,

7:05 oh, look at this. Oh, look at that.

7:08 Anna: This Martian test has given the science team

7:11 a head start on learning how to process the

7:14 data and understand the instrument's

7:16 behavior. Exercising those muscles just

7:19 like they will out at Europa. The Europa

7:22 Clipper's total journey to the icy Moon will

7:25 be about 2.9 billion

7:27 kilometers. And it includes one more

7:30 gravity assist using Earth in

7:32 2026. Currently, the

7:34 spacecraft is about 450 million

7:37 kilometers from Earth, steadily making its

7:40 way to Jupiter.

7:41 Avery: That's an incredible level of preparation for

7:43 the Europa Clipper.

7:45 Speaking of unique opportunities to study

7:47 distant objects, let's pivot to something

7:50 truly rare. An interstellar visitor to our

7:52 solar system.

7:53 Anna: Yes. Astronomers using the Hubble Space

7:56 Telescope have captured stunning

7:59 observations of 3I

8:01 atlas for the first time. This

8:04 is only the third confirmed object from

8:07 outside our solar system ever known to

8:10 visit our cosmic neighborhood. Following

8:12 Oumuamua in 2017 and

8:15 Borisov in 2019.

8:18 Each of these objects offers a unique

8:20 window into planetary systems around

8:23 other stars.

8:24 Avery: What makes 3i Atlas particularly fascinating

8:27 is its behavior. Even at 3.8

8:30 astronomical units from the sun, almost four

8:32 times farther than Earth is from the sun,

8:34 it's already showing significant activity.

8:37 Unlike asteroids, which typically remain

8:39 largely unchanged, 3i Atlas is

8:42 behaving more like a comet.

8:44 Anna: That's right. As solar radiation heats its

8:47 surface, the object is releasing streams

8:50 of dust particles, forming a distinctive

8:53 tail pointing away from the Sun. This

8:55 comet like activity provides

8:58 astronomers with a rare opportunity to study

9:01 material that originated in an entirely

9:03 different star system.

9:05 Avery: Using Hubble's exceptional resolution, the

9:07 research team led by David Jewett from

9:09 UCLA was able to have its first close

9:12 look and estimate how much material 3i atlas

9:15 is losing, they calculated the mass loss

9:18 rate in dust to be between 6-60

9:20 kg per second. To put that into

9:23 perspective, that's roughly equivalent to

9:25 losing the mass of a small car every few

9:28 minutes, which is a significant amount for

9:31 such a distant and relatively small object.

9:33 Anna: The team also worked to determine the size of

9:36 3i ATLS's nucleus, though this was

9:39 challenging since they could only see the

9:41 glowing cloud of dust, not the solid core,

9:44 directly. By analyzing the brightness

9:47 distribution of the surrounding coma, they

9:49 estimated the nucleus has an effective radius

9:52 of less than 2.8 kilometers, assuming

9:55 it reflects only about 4% of the light that

9:57 hits it, similar to charcoal.

10:00 Avery: This size constraint is crucial for

10:03 understanding its composition and history.

10:05 For instance, if its activity is driven by

10:08 carbon monoxide turning from solid to gas,

10:11 the the nucleus cannot be smaller than 0.16

10:14 km in radius. Different materials

10:17 require different amounts of solar heating to

10:19 begin sublimating. So observing how and

10:22 when 3i ATLS becomes active

10:25 helps scientists make educated guesses about

10:28 what it's made of.

10:29 Anna: These first Hubble observations of three I

10:32 ATLAS represent a significant step forward

10:35 in our ability to study these cosmic

10:38 messengers. They offer insights not only

10:41 into the object itself, but also into the

10:44 distant stellar system that sent it on its

10:46 incredible journey through the galaxy. It's

10:49 like getting a postcard from another star

10:51 system carrying chemical signatures and

10:54 physical characteristics shaped by alien

10:57 environments billions of kilometers away.

10:59 From ancient light to interstellar visitors.

11:02 We've covered some truly mind bending topics

11:05 today.

11:06 But let's shift gears and look at the more

11:08 immediate future because it's shaping up to

11:10 be a very busy week for launches.

11:13 Avery: You're not kidding, Anna. Uh, we've got a

11:15 packed schedule coming up with several

11:17 significant missions. First up,

11:20 ULA's Vulcan rocket is scheduled for its

11:22 first launch of 2025 on Tuesday, August

11:25 12th. This mission, designated

11:28 USF106, will carry a

11:31 technology demonstration navigation satellite

11:33 and NTS3 and a classified payload

11:36 for the US Space Force into geosynchronous

11:39 orbit.

11:40 Anna: And just a day later, on Wednesday, August

11:43 13, Europe's newest launch system,

11:46 the Ariane 6, will have its second

11:49 flight of 2025. This mission

11:52 will carry the Metop SGA1

11:55 weather satellite for Umetsat, which is

11:57 crucial for monitoring weather, climate and

12:00 the environment from space. It even

12:03 includes the Sentinel 5 instrument for

12:06 global air quality monitoring.

12:07 Avery: On the same day, a Chinese Chenzang 5B

12:10 rocket is expected to launch carrying a batch

12:13 of communications satellites, likely part of

12:15 China's ambitious Satnet constellation.

12:18 Beyond these, we also have four SpaceX Falcon

12:20 9 Starlink missions planned throughout the

12:22 week, deploying hundreds of Internet

12:25 satellites into orbit. It's an exciting time

12:27 to be watching the skies.

12:29 Anna: What a week it's shaping up to be for space

12:31 enthusiasts. From record breaking distant

12:34 signals, to critical tests for our missions

12:37 to the outer solar system, and even a visit

12:39 from another star system, it's been a

12:42 truly captivating episode.

12:43 Avery: M. Absolutely, Anna. Uh, and let's not

12:46 forget that jam packed launch schedule coming

12:49 up with new rockets and dozens of satellites

12:51 heading to orbit. It just goes to show how

12:53 dynamic and exciting the world of astronomy

12:56 and space exploration. Truly.

12:59 Anna: We hope you enjoyed diving into these

13:01 fascinating stories with us. Thank you for

13:03 tuning in to Astronomy Daily. And remember to

13:06 visit our [email protected]

13:09 for even more from the Astronomy Daily team.

13:12 Avery: Keep looking up, stay curious and we'll catch

13:15 you tomorrow. For more news from across the

13:17 cosmos.