S03E196: Earth's Magnetic Melody, Lunar Propulsion Leap, and Black Hole Jet Mysteries

0:00 Speaker 1: Welcome to Astronomy Daily, your source for the latest space

0:03 Speaker 1: and astronomy news. Today, we have an incredible lineup of

0:06 Speaker 1: stories from across the cosmos. We'll be exploring everything from

0:10 Speaker 1: the mysterious sounds of Earth's magnetic field reversals, to groundbreaking

0:14 Speaker 1: discoveries about black hole jets, and much more. Stay with

0:18 Speaker 1: us as we journey from our home planet to the

0:20 Speaker 1: far reaches of space, uncovering the latest developments in astronomy

0:23 Speaker 1: and space exploration. First up in today's stories, Every four

0:28 Speaker 1: hundred and fifty thousand years or so, something remarkable happens to

0:31 Speaker 1: our planet. Earth's magnetic poles completely flip North becomes south

0:36 Speaker 1: and South becomes north. While this might sound alarming, scientists

0:40 Speaker 1: tell us these reversals appear to be harmless to life

0:43 Speaker 1: on Earth, though they are certainly dramatic events. The European

0:47 Speaker 1: Space Agency recently created a fascinating soundscape of what these

0:50 Speaker 1: magnetic reversals might sound like, using data from their Swarm

0:54 Speaker 1: satellite mission. The project focused specifically on the last Champs event,

0:59 Speaker 1: which occurred about forty one thousand years ago. During this event,

1:03 Speaker 1: the Earth's magnetic field weakened to just five percent of

1:06 Speaker 1: its normal strength for several hundred years. Scientists at the

1:10 Speaker 1: Technical University of Denmark and the German Research Center for

1:13 Speaker 1: Geosciences transformed this data into an otherworldly audio experience. They

1:19 Speaker 1: combined natural sounds like falling rocks and creaking wood with

1:22 Speaker 1: more alien like elements to create something that sounds both

1:26 Speaker 1: familiar and strange, as if some ancient forces stirring deep

1:30 Speaker 1: within our planet. The result was so compelling that it

1:49 Speaker 1: was featured as a public art installation in Copenhagen, where

1:52 Speaker 1: thirty two speakers each played sounds representing magnetic field changes

1:57 Speaker 1: from different locations around the world. This unique project not

2:01 Speaker 1: only helps us understand these mysterious geological events, but also

2:05 Speaker 1: gives us a new way to experience and relate to

2:07 Speaker 1: our planet's dynamic magnetic field. What makes this particularly intriguing

2:12 Speaker 1: is that some scientists believe we might be overdue for

2:15 Speaker 1: another magnetic pole reversal. The last complete flip happened seven

2:19 Speaker 1: hundred eighty thousand years ago, well beyond the average interval

2:23 Speaker 1: of four hundred and fifty thousand years between reversals. Next up,

2:28 Speaker 1: in what could be a game changing development for space exploration,

2:31 Speaker 1: Researchers at the University of Illinois or Bana Champagne have

2:35 Speaker 1: developed a revolutionary new propulsion system that could transform how

2:39 Speaker 1: we send spacecraft to the Moon. This innovative approach, known

2:43 Speaker 1: as multimode propulsion, combines both high thrust chemical propulsion and

2:47 Speaker 1: low thrust electric propulsion while cleverly using just a single propellant.

2:52 Speaker 1: What makes this system particularly exciting is its remarkable flexibility.

2:57 Speaker 1: The spacecraft can switch between high thrust chemical mode for

3:00 Speaker 1: rapid acceleration and low thrust electrospray mode for precise orbital maneuvers.

3:06 Speaker 1: This dual capability system could significantly reduce the amount of

3:09 Speaker 1: fuel needed for lunar missions while offering mission planners unprecedented

3:14 Speaker 1: versatility in how they move spacecraft through space. Unlike traditional

3:19 Speaker 1: hybrid propulsion systems that require separate fuel tanks for different

3:23 Speaker 1: types of engines, this multimode approach uses a single chemical

3:27 Speaker 1: propellant like hydrozene to power both systems. This dramatic simplification

3:32 Speaker 1: means spacecraft can be lighter and more cost effective to

3:35 Speaker 1: launch while still maintaining the benefits of both propulsion types.

3:39 Speaker 1: The research team has already demonstrated the feasibility of this

3:42 Speaker 1: technology for NASA relevant lunar missions, particularly with small cube sets.

3:47 Speaker 1: Their computer simulations show that multimode propulsion could enable these

3:51 Speaker 1: compact spacecraft to perform complex maneuvers that would be impossible

3:55 Speaker 1: with conventional propulsion systems. Perhaps most importantly, this technology isn't

4:01 Speaker 1: just theoretical, it's being developed for practical applications. The researchers

4:05 Speaker 1: have created algorithms that can automatically select the optimal propulsion

4:09 Speaker 1: mode for any given situation, potentially revolutionizing how we plan

4:13 Speaker 1: and execute missions between Earth and the Moon and eventually

4:16 Speaker 1: to Mars and beyond. Moving on to our next story,

4:21 Speaker 1: fascinating new research from the University of Michigan has revealed

4:24 Speaker 1: surprising details about the powerful jets emitted by supermassive black holes.

4:29 Speaker 1: By analyzing over two decades of data from NASA's Chandra

4:32 Speaker 1: X ray observatory, scientists have discovered that these cosmic jets

4:37 Speaker 1: behave quite differently when viewed in X rays compared to

4:39 Speaker 1: radio waves. The team focus their attention on the galaxy

4:43 Speaker 1: Centaurus A, which hosts the closest known black hole jet

4:47 Speaker 1: to Earth, about twelve million light years away. They tracked

4:50 Speaker 1: bright features called knots within the jet, measuring their movements

4:54 Speaker 1: over time with remarkable precision. One of the most striking

4:58 Speaker 1: findings was the detection of a knot moving at an

5:01 Speaker 1: astonishing ninety four percent the speed of light, significantly faster

5:06 Speaker 1: than similar features observed in radio wavelengths, which only reached

5:09 Speaker 1: about eighty percent light speed. Even more intriguingly, this fastest

5:14 Speaker 1: moving knot was found in an unexpected location, neither closest

5:18 Speaker 1: to nor farthest from the black hole. The study challenges

5:22 Speaker 1: our previous understanding of how these jets behave. Earlier radio

5:26 Speaker 1: observations suggested that the fastest moving structures would be found

5:29 Speaker 1: closest to the black hole, but the X ray data

5:32 Speaker 1: tells a different story. This discrepancy between X ray and

5:36 Speaker 1: radio observations hints at complex underlying physics were only beginning

5:39 Speaker 1: to understand. These findings open new avenues for studying black

5:43 Speaker 1: hole jets, suggesting that X ray observations might reveal unique

5:47 Speaker 1: aspects of these cosmic phenomena that remain invisible at other wavelengths.

5:52 Speaker 1: The research team is now planning to apply their analysis

5:55 Speaker 1: techniques to jets from other galaxies, hoping to uncover more

5:59 Speaker 1: secrets about these enigmatic cosmic features. The Sun certainly got

6:04 Speaker 1: into the Halloween spirit this year, treating us to quite

6:07 Speaker 1: the spooky spectacle. On October thirty first, a powerful X

6:11 Speaker 1: two zero solar flare erupted from a sun spot designated

6:15 Speaker 1: as AR three thousand, eight hundred and seventy eight, lighting

6:18 Speaker 1: up our star's surface at five twenty pm Eastern time.

6:22 Speaker 1: This wasn't just any ordinary flare. X class flares represent

6:26 Speaker 1: the most powerful category in our classification system, with each

6:29 Speaker 1: one being ten times more powerful than the M class

6:32 Speaker 1: flares below them. The two point zero rating indicates this

6:35 Speaker 1: was a particularly strong event even within its class. The

6:39 Speaker 1: blast packed enough punch to cause significant radio blackouts across

6:43 Speaker 1: parts of the Pacific Ocean. When these powerful flares release

6:47 Speaker 1: their burst of ultraviolet radiation, they can temporarily disrupt our

6:51 Speaker 1: ability to use shortwave radio communications, which is exactly what

6:55 Speaker 1: happened in this case, reaching an R three strong level

6:58 Speaker 1: on Noah's Space weather Scale. Interestingly, while solar flares can

7:03 Speaker 1: often be accompanied by massive eruptions of plasma called coronal

7:06 Speaker 1: mass ejections or CMEs, this event didn't produce one. That

7:11 Speaker 1: means we missed out on the possibility of seeing auroras

7:13 Speaker 1: in the following days, as it's these CMEs that interact

7:17 Speaker 1: with Earth's magnetic field to produce those spectacular light shows. However,

7:21 Speaker 1: space weather forecasters are telling us we're not done yet.

7:25 Speaker 1: There's a good chance we'll see more powerful flares through

7:27 Speaker 1: the end of the weekend, including the possibility of additional

7:31 Speaker 1: X class events. It seems our Sun is determined to

7:34 Speaker 1: keep the fireworks going well after Halloween. Here's a great

7:38 Speaker 1: collaboration story. Recent joint observations from NASA's Hubble and James

7:42 Speaker 1: Webb space telescopes have revealed an intriguing mystery surrounding Vega,

7:47 Speaker 1: one of the brightest stars in our northern sky. The

7:50 Speaker 1: telescopes have given us an unprecedented look at the massive

7:54 Speaker 1: debris disc that encircles this celestial neighbor, and what they

7:57 Speaker 1: found has left astronomers scratching their heads. The disc, which

8:01 Speaker 1: stretches nearly one hundred billion miles in diameter, appears remarkably

8:06 Speaker 1: and unusually smooth. So smooth, in fact, that it's challenging

8:10 Speaker 1: our current understanding of how planetary systems typically behave unlike

8:16 Speaker 1: other similar systems we've observed there's no obvious evidence of

8:19 Speaker 1: large planets carving paths through the disc like cosmic snowplows.

8:24 Speaker 1: The Web telescope detected an infrared glow from sand sized

8:27 Speaker 1: particles swirling around this brilliant blue white star, which outshines

8:31 Speaker 1: our Sun by a factor of forty. Meanwhile, Hubble captured

8:35 Speaker 1: in outer halo containing particles no larger than smoke, all

8:38 Speaker 1: reflecting Vega's intense starlight. What makes this discovery particularly fascinating

8:43 Speaker 1: is how it differs from similar nearby stars. Take fomal Hout,

8:47 Speaker 1: for instance, a star of comparable age, distance and temperature

8:51 Speaker 1: to Vega. While fomal Hout shows three distinct debris belts,

8:55 Speaker 1: likely shepherded by planets, Vega's disc is strikingly uniform, with

9:00 Speaker 1: only a subtle gap at about twice Neptune's orbital distance

9:03 Speaker 1: from the Sun. This smooth, seemingly undisturbed disc suggests an

9:08 Speaker 1: absence of Neptune sized or larger planets in wide orbits,

9:11 Speaker 1: unlike our solar system. It's forcing astronomers to rethink their

9:16 Speaker 1: theories about the variety and formation of planetary systems, proving

9:20 Speaker 1: once again that the universe has plenty of surprises left

9:23 Speaker 1: to reveal. While we await the arrival of NASA's Europa

9:27 Speaker 1: Clipper probe in about six years, space enthusiasts can now

9:31 Speaker 1: get an early preview of Jupiter's fascinating icy moon through

9:34 Speaker 1: NASA's newly updated Europa Trek web portal. This virtual exploration

9:39 Speaker 1: tool offers an incredible opportunity to soar over Europa's mysterious

9:43 Speaker 1: surface using compiled imagery from previous missions including Voyager two, Galileo,

9:49 Speaker 1: and Juno. One of the most striking features you'll notice

9:53 Speaker 1: during these virtual flybys are the dark lines crisscrossing the

9:56 Speaker 1: Moon's surface, known as linear Scientists believe the these markings

10:00 Speaker 1: are actually cracks in Europa's icy crust, which flex open

10:04 Speaker 1: and closed as Jupiter's powerful tidal forces pull on the

10:07 Speaker 1: Moon during its orbit. Interestingly, Europa's surface shows remarkably few

10:12 Speaker 1: impact craters, which tells us something fascinating about its age.

10:16 Speaker 1: While the Moon itself formed around four point five billion

10:19 Speaker 1: years ago, its surface appears to be surprisingly young, somewhere

10:23 Speaker 1: between twenty and one hundred and eighty million years old.

10:26 Speaker 1: This suggests that Europa is geologically active, constantly renewing its

10:30 Speaker 1: icy exterior. This virtual tour provides an excellent preview of

10:34 Speaker 1: what Europa Clipper might discover when it reaches its destination.

10:38 Speaker 1: The portal is freely accessible to anyone interested in exploring

10:41 Speaker 1: this intriguing world, offering both guided tours of Europa's major

10:45 Speaker 1: landmarks and the freedom to investigate the Moon's surface independently.

10:50 Speaker 1: It's just one of many similar tools NASA offers for

10:53 Speaker 1: exploring various bodies throughout our Solar system. Fascinating stuff, and

10:57 Speaker 1: if you'd like to check it out, I've included a

10:59 Speaker 1: link in the show notes that wraps up our coverage

11:03 Speaker 1: for today on Astronomy Daily. If you'd like to stay

11:06 Speaker 1: up to date with all the latest developments in space

11:09 Speaker 1: and astronomy, be sure to visit our website at Astronomydaily

11:12 Speaker 1: dot io. There you'll find our constantly updating news feed,

11:16 Speaker 1: all our past episodes, and links to our valued sponsors.

11:20 Speaker 1: Don't forget to sign up for our free daily newsletter

11:22 Speaker 1: while you're there. It's the perfect way to ensure you

11:25 Speaker 1: never miss any important space news or updates. You can

11:29 Speaker 1: also connect with us across social media. Just search for

11:31 Speaker 1: astro Daily Pod on Facebook, x, YouTube, Tumbler, and TikTok.

11:36 Speaker 1: This has been anna with Astronomy Daily. Thanks for joining

11:39 Speaker 1: me today as we explored the wonders of our universe together.

11:42 Speaker 1: Until next time, keep looking up star stories to tell