S03E222: Venus's Ocean Mystery, Gravitational Wave Breakthrough, and China's Satellite Milestone

0:00 Speaker 1: Welcome to another exciting episode of Astronomy Daily. We have

0:04 Speaker 1: a fascinating lineup of stories for you today, packed with

0:07 Speaker 1: groundbreaking discoveries and remarkable achievements in space exploration. We'll delve

0:12 Speaker 1: into new research that finally answers whether Venus, often called

0:16 Speaker 1: Earth's twin, ever had oceans on its surface. Then we'll

0:20 Speaker 1: explore an extraordinary breakthrough in gravitational wave mapping that's giving

0:24 Speaker 1: us unprecedented insights into the architecture of our universe. We'll

0:27 Speaker 1: also look at China's latest milestone in satellite technology, catch

0:32 Speaker 1: up on an incredibly busy week of space launches, and

0:35 Speaker 1: follow BEPI Colombo's latest encounter with Mercury that's bringing us

0:39 Speaker 1: haunting new images of the Solar System's innermost planet. Stay

0:44 Speaker 1: with us as we journey through these remarkable developments in

0:47 Speaker 1: space and astronomy that continue to expand our understanding of

0:50 Speaker 1: the Cosmos. Let's get started. Recent research has provided compelling

0:56 Speaker 1: evidence about Venus's ancient history, definitively answering whether our planetary

1:00 Speaker 1: neighbour ever hosted oceans. The study, published in Nature Astronomy

1:05 Speaker 1: examined the chemical composition of Venus' atmosphere to determine the

1:08 Speaker 1: water content of the planet's interior, a crucial indicator of

1:12 Speaker 1: its past conditions. The findings paint a stark picture of

1:16 Speaker 1: Venus's history. By analyzing volcanic gases in the planet's atmosphere,

1:20 Speaker 1: scientists discovered that Venusian eruptions contain no more than six

1:24 Speaker 1: percent water vapor, a dramatic contrast to Earth's volcanic emissions,

1:29 Speaker 1: which are more than sixty percent water vapor. This indicates

1:33 Speaker 1: that Venus has always had a substantially dry interior, suggesting

1:37 Speaker 1: the planet never experience the conditions necessary for oceans to form.

1:41 Speaker 1: The research challenges previous hypotheses about Venus potentially harboring a

1:46 Speaker 1: hidden reservoir of water beneath its surface, a remnant of

1:50 Speaker 1: a lost ocean. Instead, the evidence supports the theory that

1:54 Speaker 1: Venus remained parched after its early molten rock phase, never

1:59 Speaker 1: developing the canitions we associate with habitability. While Venus and

2:03 Speaker 1: Earth are often called sister planets due to their similar size, mass, density,

2:08 Speaker 1: and distance from the Sun, their evolutionary paths diverged dramatically. Today,

2:13 Speaker 1: Venus presents extreme conditions that bear little resemblance to Earth

2:17 Speaker 1: with surface temperatures reaching four hundred and sixty five degrees celsius,

2:22 Speaker 1: atmospheric pressure ninety times greater than Earth's, and toxic clouds

2:27 Speaker 1: of sulfuric acid. This research provides valuable insights into planetary

2:32 Speaker 1: evolution and the factors that determine habitability. It suggests that

2:36 Speaker 1: Venus's current hostile environment isn't the result of losing its

2:40 Speaker 1: oceans over time, but rather reflects conditions that have persisted

2:44 Speaker 1: throughout most of its history. The findings help us better

2:47 Speaker 1: understand why Earth and Venus, despite their initial similarities, developed

2:53 Speaker 1: such dramatically different environments. In a groundbreaking development, Australian astrophysicists

2:59 Speaker 1: have created the most detailed maps of gravitational waves ever produced,

3:03 Speaker 1: offering unprecedented insights into the universe's most massive black holes

3:07 Speaker 1: and their cosmic influence. Led by Matt Miles from OSGREV

3:11 Speaker 1: and Swinburne University, this international effort has revealed a more

3:15 Speaker 1: dynamic and active universe than previously anticipated. The mapping project

3:19 Speaker 1: utilized the mere Cat Pulsar Timing Array, the largest galactic

3:23 Speaker 1: scale gravitational wave detector ever built by observing pulsars rapidly

3:28 Speaker 1: spinning neutron stars that act as precise cosmic timekeepers. Researchers

3:33 Speaker 1: could detect minuscule changes caused by gravitational waves with remarkable

3:37 Speaker 1: nanosecond level precision. One of the most intriguing discoveries is

3:41 Speaker 1: an unexpected hot spot in the gravitational wave signal. According

3:46 Speaker 1: to Rowena Nathan from osgrav and Monash University, this hot

3:49 Speaker 1: spot could indicate the presence of a pair of black

3:52 Speaker 1: holes billions of times more massive than our Sun. This

3:56 Speaker 1: finding challenges the previous assumption that the background signal would

3:59 Speaker 1: be us to form across the sky. The team's observations

4:03 Speaker 1: captured a stronger signal of background gravitational waves than similar

4:07 Speaker 1: global experiments, and remarkably, they achieved this in just one

4:12 Speaker 1: third of the time. This enhanced detection capability opens new

4:16 Speaker 1: possibilities for studying the echoes of cosmic events that occurred

4:20 Speaker 1: billions of years ago. These maps serve as a powerful

4:23 Speaker 1: tool for understanding the universe's structure and evolution. They're helping

4:27 Speaker 1: scientists track the locations and numbers of merging supermassive black holes,

4:32 Speaker 1: explore the origins of these cosmic giants, and even provide

4:36 Speaker 1: insights into major events from our universe's early history. This

4:40 Speaker 1: research represents a significant step forward in our ability to

4:43 Speaker 1: observe and understand the gravitational architecture of our cosmos. China

4:48 Speaker 1: has marked a significant milestone in satellite technology with the

4:52 Speaker 1: successful deployment and handover of Apstar six e, their first

4:56 Speaker 1: all electric propulsion telecommunications satellite. This achievement represents a major

5:01 Speaker 1: advancement in satellite operations and demonstrates China's growing capabilities in

5:06 Speaker 1: space technology. The satellite, developed by the China Academy of

5:10 Speaker 1: Space Technology, operates from geostationary orbit using the advanced DFH

5:16 Speaker 1: three E platform. What makes this satellite particularly noteworthy is

5:20 Speaker 1: its innovative propulsion system. Rather than traditional chemical propulsion, it

5:25 Speaker 1: relies entirely on electric propulsion technology to maintain its orbital

5:29 Speaker 1: position and make adjustments. Launched earlier this year aboard a

5:33 Speaker 1: long March two sea rocket from the Sheichung Satellite Launch Center,

5:37 Speaker 1: app Star sixe successfully transitioned to its geostationary orbit using

5:42 Speaker 1: only its electric propulsion systems after separating from its propulsion module.

5:46 Speaker 1: This approach not only demonstrates remarkable efficiency, but also represents

5:50 Speaker 1: a more cost effective method of satellite deployment. The satellite,

5:55 Speaker 1: which has been designed for a fifteen year operational lifespan,

5:58 Speaker 1: is now being operated by Hong Kong based app Star

6:01 Speaker 1: Alliance Satcom Limited. Its primary mission is to provide affordable,

6:06 Speaker 1: high throughput broadband communication services, with a particular focus on

6:10 Speaker 1: serving customers in Indonesia. This technological advancement not only showcases

6:15 Speaker 1: China's growing expertise in satellite technology, but also represents a

6:20 Speaker 1: significant step forward in making space based communications more accessible

6:24 Speaker 1: and sustainable. This successful deployment adds China to a select

6:29 Speaker 1: group of nations capable of developing and operating all electric

6:32 Speaker 1: propulsion satellites, marking another significant milestone in the ongoing evolution

6:36 Speaker 1: of space technology. Space launch activities are reaching a fever

6:41 Speaker 1: pitch this week, with an impressive lineup of ten orbital

6:44 Speaker 1: launches planned. SpaceX is leading the charge with an ambitious

6:48 Speaker 1: schedule of five Falcon nine launches in just five days,

6:51 Speaker 1: showcasing the company's remarkable launch cadence capabilities. Four of these

6:56 Speaker 1: SpaceX missions will be dedicated to expanding their stars Link

7:00 Speaker 1: satellite constellation, while the fifth will carry SXM nine, a

7:04 Speaker 1: digital audio radio satellite for seriousxm These launches will take

7:09 Speaker 1: place from both coasts of the United States, utilizing launch

7:12 Speaker 1: facilities in California and Florida. China is maintaining its strong

7:16 Speaker 1: presence in space activities with three launches scheduled this week.

7:20 Speaker 1: While details about some of these missions remain classified, we

7:24 Speaker 1: know they'll be using various vehicles from their long March

7:26 Speaker 1: rocket family, including their newer Kwaijo one, a quick reaction vehicle.

7:31 Speaker 1: The European space sector has two particularly noteworthy launches on

7:35 Speaker 1: the schedule. The first involves India's PSLV XCEL rocket carrying

7:39 Speaker 1: a pair of European spacecraft designed for solar observation. The

7:43 Speaker 1: second is the much anticipated launch of the Sentinel one

7:46 Speaker 1: s radar satellite aboard a Vegas Sea rocket from French Guiana,

7:51 Speaker 1: a mission that has faced significant delays following a launch

7:53 Speaker 1: failure last year. Russia is also joining the launch lineup

7:57 Speaker 1: with a planned Soyuz mission from their Placetsk Cosmodrome carrying

8:01 Speaker 1: a military satellite designated as Cosmos twenty five to eighty.

8:05 Speaker 1: This launch had been previously delayed, but is now scheduled

8:07 Speaker 1: to proceed this week, adding to the week's activities SpaceX's

8:12 Speaker 1: CRS thirty one cargo Dragon spacecraft is scheduled to depart

8:15 Speaker 1: from the International Space Station and return to Earth via splashdown.

8:20 Speaker 1: Once recovered, this vessel will be refurbished for future cargo

8:23 Speaker 1: missions to the station, demonstrating the ongoing benefits of reusable

8:26 Speaker 1: spacecraft technology. This concentrated burst of launch activity reflects the

8:31 Speaker 1: increasingly dynamic nature of modern space operations, with multiple nations

8:36 Speaker 1: and private companies working simultaneously to expand humanity's presence in orbit.

8:41 Speaker 1: The European Space Agency and jacksa's BEPI Columbo spacecraft has

8:45 Speaker 1: just completed its fifth flyby of Mercury, marking another crucial

8:50 Speaker 1: milestone in its journey to study our Solar System's innermost planet.

8:54 Speaker 1: Unlike its previous approach, which brought the probe within just

8:57 Speaker 1: one hundred and three miles of Mercury's surface, this latest

9:01 Speaker 1: flyby occurred at a much greater distance, approximately two hundred

9:04 Speaker 1: times farther out. Despite the increased distance, BEPI Colombo managed

9:08 Speaker 1: to capture another striking image of Mercury standing alone against

9:12 Speaker 1: the darkness of space. This flyby was particularly significant as

9:16 Speaker 1: it marked the first use of the Probe's Mercury Radiometer

9:19 Speaker 1: and Thermal Infrared Spectrometer, known as MYRTIS. This sophisticated instrument

9:23 Speaker 1: is designed to measure the planet's surface temperature and composition,

9:27 Speaker 1: helping scientists identify the types of minerals present on Mercury,

9:30 Speaker 1: one of the key mysteries this mission aims to unravel. Bepy.

9:34 Speaker 1: Columbo began its ambitious journey in twenty eighteen, launched aboard

9:38 Speaker 1: an ARIANE five rocket. While originally scheduled to enter Mercury's

9:42 Speaker 1: orbit in December twenty twenty five, some thruster issues have

9:45 Speaker 1: slightly extended the timeline, with orbital insertion now planned for

9:49 Speaker 1: November twenty twenty six. Once there, the spacecraft will split

9:53 Speaker 1: into two separate orbiters, Issa's Mercury Planetary Orbiter and Jacksa's

9:57 Speaker 1: Mercury Magnetospheric Orbiter, with sixteen different scientific instruments to study

10:02 Speaker 1: this mysterious world. The probe has been using a series

10:06 Speaker 1: of carefully planned planetary flybys since twenty twenty, utilizing the

10:10 Speaker 1: gravity of Earth, Venus, and Mercury to gradually adjust its trajectory.

10:16 Speaker 1: After successful passes of Earth and Venus and previous Mercury

10:19 Speaker 1: encounters in twenty twenty one, twenty twenty two, and twenty

10:23 Speaker 1: twenty three. The probe now has just one more Mercury

10:26 Speaker 1: fly by remaining scheduled for January eighth, twenty twenty five,

10:31 Speaker 1: before it begins its final approach to establish orbit around

10:34 Speaker 1: the planet. And that brings us to the end of

10:38 Speaker 1: today's Astronomy Daily. I'm Anna, and I want to thank

10:41 Speaker 1: you for joining me as we explored the latest developments

10:44 Speaker 1: in space and astronomy, from Venus's ancient mysteries to Bepy

10:48 Speaker 1: Columbo's ongoing mission to Mercury. There's always something fascinating happening

10:53 Speaker 1: in our cosmic neighborhood. If you'd like to stay up

10:56 Speaker 1: to date with all things space and astronomy, head over

10:58 Speaker 1: to our website at astronom to Me daily dot io.

11:01 Speaker 1: There you can sign up for our free daily newsletter

11:04 Speaker 1: and explore our constantly updating news feed with all the

11:07 Speaker 1: latest space news. While you're there, don't forget to check

11:10 Speaker 1: out our complete archive of past episodes. Want to be

11:13 Speaker 1: part of our space loving community. You can find us

11:16 Speaker 1: across all major social platforms. Just search for astro Daily

11:19 Speaker 1: Pod on Facebook, x YouTube, tumbler and TikTok. Until next time,

11:24 Speaker 1: keep looking up and stay curious about the Cosmos. Sunny

11:28 Speaker 1: Day Star spit Star sy