S03E212: Einstein's Legacy, China's Space Triumphs, and the Cosmic Guitar

0:00 Speaker 1: Hi everyone, and welcome to Astronomy Daily, your daily dose

0:03 Speaker 1: of space news and astronomical discoveries. I'm Anna, and we've

0:07 Speaker 1: got an incredible lineup of stories for you today. From

0:11 Speaker 1: groundbreaking confirmations of Einstein's theories to SpaceX's latest adventure with

0:15 Speaker 1: an unusual passenger, We're covering the full spectrum of space

0:19 Speaker 1: exploration and discovery. Today. We'll journey from the largest scales

0:23 Speaker 1: of our universe, where scientists have been testing Einstein's predictions

0:27 Speaker 1: about gravity, all the way to our cosmic backyard, where

0:31 Speaker 1: China's space station has been bustling with activity. We'll also

0:35 Speaker 1: explore some fascinating new developments in space technology, including an

0:39 Speaker 1: artificial star project and a potentially life saving emergency system

0:42 Speaker 1: for future lunar explorers. So strap in and get ready

0:46 Speaker 1: for another exciting journey through the latest developments in space

0:49 Speaker 1: science and exploration. First up today, in a remarkable validation

0:55 Speaker 1: of one of physics's most fundamental theories, scientists have just

0:58 Speaker 1: completed the most precise test ever of how gravity behaves

1:02 Speaker 1: at cosmic scales. Using observations from the Dark Energy Spectroscopic

1:06 Speaker 1: Instrument in Arizona. Researchers tracked nearly six million galaxies and

1:10 Speaker 1: their luminous cores over a period spanning eleven billion years.

1:15 Speaker 1: That's about eighty percent of our universe's entire history. What

1:19 Speaker 1: they found would have made Einstein proud. The way gravity

1:22 Speaker 1: shapes our cosmos at the largest scales matches exactly what

1:25 Speaker 1: Einstein predicted in his nineteen fifteen theory of general relativity.

1:29 Speaker 1: This theory, which revolutionized our understanding of the universe by

1:33 Speaker 1: linking space, time, and gravity, continues to hold true even

1:37 Speaker 1: when tested at the most extreme cosmic scales imaginable. The

1:41 Speaker 1: study wasn't just about confirming Einstein's work, though, It was

1:44 Speaker 1: part of a broader investigation into dark energy, that mysterious

1:48 Speaker 1: force causing our universe's expansion to accelerate. Interestingly, while gravity

1:53 Speaker 1: behaves as Einstein predicted, the researchers found evidence suggesting that

1:56 Speaker 1: dark energy might be more dynamic than previously thought, potentially

2:00 Speaker 1: weakening over time rather than remaining constant. This discovery could

2:05 Speaker 1: have profound implications for our understanding of the universe's future evolution.

2:10 Speaker 1: If dark energy is indeed changing, it means the universe's

2:13 Speaker 1: expansion might not continue accelerating forever as once thought. It's

2:17 Speaker 1: worth noting that dark energy makes up about sixty eight

2:20 Speaker 1: percent of our universe's contents, while dark matter accounts for

2:24 Speaker 1: twenty seven percent, leaving just five percent for all the

2:27 Speaker 1: ordinary matter we can see and interact with, including everything

2:31 Speaker 1: from stars and planets to people and popcorn. China's space

2:35 Speaker 1: program continues to achieve impressive milestones with its Tianzo cargo

2:40 Speaker 1: missions supporting the Tiangong space station. The Chianzo seven spacecraft

2:45 Speaker 1: recently concluded its mission with a controlled re entry into

2:48 Speaker 1: Earth's atmosphere, with most of the vehicle disintegrating as planned

2:52 Speaker 1: and only minor debris landing in designated sea zones. Before

2:56 Speaker 1: its dramatic finale, Tianzho seven completed one last assignment, deploying

3:01 Speaker 1: a small educational satellite into orbit during its week long

3:04 Speaker 1: solo mission after separating from the space station. The spacecraft

3:08 Speaker 1: had initially launched from the wen Chung Space Launch Center

3:11 Speaker 1: back in January. As one mission ended, another began, with

3:15 Speaker 1: Tianzo eight launching from the same spaceport and successfully docking

3:19 Speaker 1: with Tiangong's Tianhe core module after just a three hour flight.

3:23 Speaker 1: This marks the fifteenth spacecraft to connect with the station,

3:26 Speaker 1: which orbits approximately four hundred kilometers above Earth. The new

3:31 Speaker 1: cargo ship delivered an impressive payload of supplies for the

3:33 Speaker 1: Shenzo twineteenth astronauts who arrived at the station in October.

3:38 Speaker 1: This includes enough provisions to sustain a three person crew

3:41 Speaker 1: for nine months, along with over eighty scientific packages weighing

3:45 Speaker 1: a combined four hundred and fifty eight kilograms, supporting thirty

3:48 Speaker 1: six different on board experiments. These experiments span in a

3:52 Speaker 1: fascinating range of research areas, from space life sciences and

3:56 Speaker 1: biotechnology to material science and fluid physics in my microgravity. One

4:01 Speaker 1: particularly interesting study will examine how submagnetic microgravity affects fruitflies

4:06 Speaker 1: genetic and behavioral traits, the first experiment of its kind.

4:11 Speaker 1: The crew has already begun the process of unpacking and

4:13 Speaker 1: organizing these vital supplies and research materials. Next up, in

4:18 Speaker 1: a groundbreaking development for astronomical research, George Mason University will

4:23 Speaker 1: lead a nineteen point five million dollars NASA mission to

4:26 Speaker 1: launch an artificial star into Earth's orbit. This innovative project,

4:30 Speaker 1: known as the Landel NASA Space mission, aims to revolutionize

4:34 Speaker 1: how we calibrate telescopes and measure stellar brightness across the cosmos.

4:38 Speaker 1: The artificial star will be positioned twenty two thousand, two

4:42 Speaker 1: hundred and thirty six miles above Earth, far enough to

4:45 Speaker 1: appear as a genuine star to ground based telescopes equipped

4:48 Speaker 1: with eight precision lasers. This celestial calibration tool will enable

4:53 Speaker 1: scientists to make unprecedented improvements in measuring everything from nearby

4:57 Speaker 1: stars to distant supernova explosi in far off galaxies. What

5:03 Speaker 1: makes this mission particularly significant is its potential impact on

5:07 Speaker 1: our understanding of the universe's expansion. While we know the

5:11 Speaker 1: universes expanding, getting precise measurements of this expansion has been challenging.

5:17 Speaker 1: The artificial star will allow scientists to achieve and remarkable

5:20 Speaker 1: accuracy of zero point two five percent in measuring stellar brightness,

5:25 Speaker 1: a level of precision that has never been possible before.

5:28 Speaker 1: The satellite won't be visible to the naked eye, but

5:31 Speaker 1: will be observable through personal telescopes. It will maintain a

5:35 Speaker 1: geosynchronous orbit, keeping it positioned over the United States during

5:39 Speaker 1: its first year of operation. The mission involves collaboration between

5:43 Speaker 1: multiple institutions, including the National Institute of Standards and Technology NASA,

5:48 Speaker 1: and several Universities, with mission control based at George Mason's

5:52 Speaker 1: Fairfax Campus. This infrastructure mission represents a transformative approach to

5:57 Speaker 1: solving one of astronomy's fundamental challenges, accurate stellar measurement. By

6:02 Speaker 1: providing a known reference point in the sky, it will

6:05 Speaker 1: help scientists refine our understanding of stellar evolution, identify potentially

6:10 Speaker 1: habitable exoplanets, and unlock new insights into the mysteries of

6:14 Speaker 1: dark energy. Moving on now to astronaut safety. When it

6:18 Speaker 1: comes to exploring the Moon, safety is paramount, and Australian

6:21 Speaker 1: researchers have developed an innovative solution to address one of

6:24 Speaker 1: the most critical challenges faced by lunar explorers. They've created

6:28 Speaker 1: a new distress alert system specifically designed for astronauts on

6:32 Speaker 1: lunar missions, adapting the proven COSPASS SARSAT technology that's been

6:37 Speaker 1: saving lives on Earth for decades. The system represents a

6:41 Speaker 1: significant advancement for NASA's Artemis program, which aims to establish

6:45 Speaker 1: a sustained human presence on the Moon. With astronauts venturing

6:50 Speaker 1: into isolated regions like the lunar South Pole, having reliable

6:53 Speaker 1: emergency communication could mean the difference between life and death,

6:57 Speaker 1: especially considering that any rescue mission could take days or

7:00 Speaker 1: even weeks to reach them. The technology relies on low

7:04 Speaker 1: power emergency beacons that astronauts can quickly activate with minimal setup.

7:09 Speaker 1: These beacons will communicate through a planned network of lunar satellites,

7:13 Speaker 1: enabling continuous communication for up to ten hours, even in

7:17 Speaker 1: challenging terrain like mountains and deep craters. The system is

7:21 Speaker 1: designed to be lighter and more reliable than existing solutions,

7:25 Speaker 1: with an extended battery life, crucial for lunar operations safety

7:29 Speaker 1: from space. The group behind this development has received one

7:33 Speaker 1: hundred thousand dollars in government funding to advance their lunar

7:36 Speaker 1: search and rescue initiatives. If successful, this Australian contribution to

7:41 Speaker 1: the Artemis program could not only safeguard future lunar explorers,

7:45 Speaker 1: but also lead to improvements in emergency communications back on Earth,

7:49 Speaker 1: particularly in remote areas where traditional communication methods are unreliable.

7:55 Speaker 1: SpaceX's latest Starship test flight drew some notable attention from

7:58 Speaker 1: military leadership, with Space Force Chief of Space Operations General

8:02 Speaker 1: Chance Saltzman making a special visit to SpaceX's Starbase facility

8:06 Speaker 1: in Bocachica. The General spent two days reviewing the program

8:10 Speaker 1: and watched the launch alongside SpaceX founder Elon Musk and

8:13 Speaker 1: other dignitaries. While the Space Force hasn't made any formal

8:17 Speaker 1: commitments to using Starship, their interest is clear. The military

8:21 Speaker 1: already relies heavily on SpaceX's Falcon rockets for national security launches,

8:26 Speaker 1: and Starship's massive payload capacity could open up new possibilities

8:30 Speaker 1: for military space operations. One intriguing concept under consideration is

8:35 Speaker 1: using Starship as a rapid global transport system, potentially delivering

8:39 Speaker 1: cargo and personnel anywhere on Earth in under an hour.

8:43 Speaker 1: The launch itself marked another milestone for SpaceX, featuring an

8:47 Speaker 1: unusual passenger, a banana serving as the spacecraft's zero gravity indicator.

8:52 Speaker 1: This eight inch toy banana, complete with mission patches and

8:55 Speaker 1: four scale printed on its side, became the first physical

8:59 Speaker 1: payload to flyboard Starship, one for the history books. SpaceX

9:03 Speaker 1: even decorated the massive spacecraft's exterior with four foot tall

9:07 Speaker 1: stickers of pixelated cartoon bananas, playing into the mission's lighthearted theme.

9:13 Speaker 1: The test flight achieved all its main objectives, including successfully

9:17 Speaker 1: relighting starships engines in space, a crucial capability needed for

9:21 Speaker 1: future orbital missions. The super heavy booster made a soft

9:25 Speaker 1: water landing in the Gulf of Mexico while Starships splashed

9:29 Speaker 1: down in the Indian Ocean about sixty five minutes after launch,

9:32 Speaker 1: marking another step forward in the development of this revolutionary spacecraft.

9:37 Speaker 1: In an extraordinary astronomical discovery, NASA's Chandra X ray Observatory

9:42 Speaker 1: and Hubble Space Telescope have revealed a cosmic structure that's

9:46 Speaker 1: been aptly nicknamed the guitar nebula. This remarkable formation features

9:51 Speaker 1: a distinctive guitar shaped nebula with what appears to be

9:54 Speaker 1: a flame like filament extending from its tip. At the

9:57 Speaker 1: heart of this cosmic guitar is a pol a rapidly

10:01 Speaker 1: rotating neutron star left behind after the collapse of a

10:04 Speaker 1: massive star. As the stellar remnant races through space, it's

10:09 Speaker 1: creating an impressive display by ejecting a stream of particles

10:12 Speaker 1: and X ray light that stretches an incredible two light

10:15 Speaker 1: years or roughly twelve trillion miles. The guitar shape itself

10:19 Speaker 1: forms from bubbles of particles blown out by the pulser's

10:22 Speaker 1: steady wind as it moves through space. What makes this structure.

10:26 Speaker 1: Particularly fascinating is how it's producing both matter and antimatter particles,

10:30 Speaker 1: essentially reversing Einstein's famous emc to equation by converting energy

10:35 Speaker 1: back into mass. Scientists have been tracking this celestial performance

10:39 Speaker 1: over two decades, combining observations from both telescopes to create

10:43 Speaker 1: a detailed movie of its evolution. The Chandra data shows

10:47 Speaker 1: the energetic particles spiraling along magnetic field lines, while Hubble

10:51 Speaker 1: captures the broader structure's movement through space. As the pulsar

10:55 Speaker 1: collides with denser regions of gas, the most energetic particles

10:59 Speaker 1: escape and create the remarkable X ray filament, much like

11:03 Speaker 1: a cosmic blowtorch shooting from the tip of the celestial instrument.

11:07 Speaker 1: The discovery isn't just visually spectacular. It's helping astronomers understand

11:11 Speaker 1: how particles travel through interstellar space and providing new insights

11:15 Speaker 1: into how pulsars interact with their surrounding environment. And that's

11:21 Speaker 1: it for this episode. Thanks for joining me Anna on

11:23 Speaker 1: today's journey through the cosmos. From groundbreaking confirmations of Einstein's

11:28 Speaker 1: theories to guitar shaped nebulas, there's always something fascinating happening

11:32 Speaker 1: in our Universe. If you want to stay up to

11:34 Speaker 1: date with all the latest space and astronomy news, head

11:37 Speaker 1: over to our website at Astronomydaily dot io. There you'll

11:41 Speaker 1: find our constantly updating news feed, all our past podcast episodes,

11:46 Speaker 1: and you can sign up for our free daily newsletter

11:49 Speaker 1: to make sure you never miss a story and don't

11:51 Speaker 1: forget to join our growing community on social media. You

11:54 Speaker 1: can find us as astro Daily Pod on Facebook, x YouTube, Tumblr,

11:58 Speaker 1: and TikTok. It's a great way to join the conversation

12:01 Speaker 1: and share your love of space with fellow astronomy enthusiasts.

12:05 Speaker 1: Until tomorrow, keep looking up and stay curious about the

12:07 Speaker 1: wonders above us. Say Star is all Star is All Star.