Oct. 30, 2024

S03E193: Voyager's Vanishing Act, Tiangong's Triumph, and Miranda's Icy Secret

S03E193: Voyager's Vanishing Act, Tiangong's Triumph, and Miranda's Icy Secret

Astronomy Daily - The Podcast: S03E193
Welcome to Astronomy Daily, your trusted source for the latest space and Astronomy news. I'm your host, Anna, and today we have an exciting lineup of stories, from the edge of our solar system to surprising...

Season 3
Astronomy Daily - The Podcast: S03E193
Welcome to Astronomy Daily, your trusted source for the latest space and Astronomy news. I'm your host, Anna, and today we have an exciting lineup of stories, from the edge of our solar system to surprising discoveries closer to home.
Highlights:
- Voyager 1 Communication Challenges: NASA's Voyager 1, 15 billion miles from Earth, recently faced communication issues due to a fault protection system trigger. After switching to a backup S band system, NASA successfully reestablished contact, showcasing the spacecraft's resilience and the challenges of maintaining aging technology in interstellar space.
- China's Tiangong Space Station Mission: A new crew of three astronauts launched to China's Tiangong Space Station, marking another milestone in the nation's space exploration. Notably, Wang Haozi joins as China's only female spaceflight engineer, contributing to lunar soil experiments that align with China's lunar ambitions.
- Potential Ocean on Uranus's Moon Miranda: Research suggests Miranda might host a subsurface ocean beneath its chaotic surface. This discovery positions Miranda among other potential ocean worlds, expanding our understanding of liquid water in the solar system.
- Mars's Extended Magnetic Field: New findings from Harvard suggest Mars's protective magnetic field lasted longer than previously thought. This extended timeline implies more favorable conditions for life to have developed, challenging assumptions about Mars's early history.
- Terraforming Mars for Tree Growth: Research from Warsaw University explores the conditions needed to grow trees on Mars, focusing on the Hellas Basin for its potential to support Martian forests, bringing us closer to transforming the Red Planet.
- Comet C 2024 S1 Atlas Disintegration: The comet, initially promising a bright Halloween display, disintegrated after a close solar encounter. Its demise offers insights into comet compositions and the extreme conditions near the Sun.
For more cosmic updates, visit our website at astronomydaily.io. Sign up for our free Daily newsletter, explore sponsor deals, and catch up on past episodes. Join our community on social media by finding us as #AstroDailyPod on Facebook, X, YouTube, Tumblr, and TikTok. Share your thoughts and connect with fellow space enthusiasts.
Thank you for tuning in. This is Anna signing off. Until next time, keep looking up and stay curious about the wonders of our universe.
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WEBVTT

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Welcome to Astronomy Daily, your source for the latest space

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in astronomy news. I'm your host, Anna, and today we've

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got an exciting lineup in store for you. We'll be

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diving into some fascinating stories, from Voyager one's latest communication

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challenges at the edge of our Solar System, to intriguing

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new discoveries about potential ocean worlds. From the furthest reaches

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of human exploration to surprising findings closer to home. We've

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got a packed show ahead that you won't want to miss.

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Let's dive into our first story of the day, which

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takes us to the very edge of human exploration. NASA's

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legendary Voyager one spacecraft, now an astounding fifteen billion miles

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from Earth, recently gave its team quite a scare when

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it temporarily fell silent. After decades of faithful service, the

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spacecraft's communications went dark, triggering an intensive effort to re

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establish contact. The drama began on October sixteenth, when the

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flight team sent what should have been a routine command

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to turn on one of the spacecraft's heaters. Despite having

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sufficient power for this operation, something unexpected happened. The spacecraft's

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fault protection system was triggered, leading to a series of

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communication challenges. The situation became even more complex when Voyager

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switched from its usual X band radio transmitter to a

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backup S band system, something it hadn't used since nineteen

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eighty one. This was particularly concerning because at such an

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enormous distance, the weaker S band signal might not have

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been detectable from Earth at all. Imagine trying to troubleshoot

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a computer problem, but instead of being able to walk

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over and check what's wrong, your commands take twenty three

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hours just to reach the device and another twenty three

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hours to get a response back. That's exactly what NASA's

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engineers faced as they worked to solve this puzzle across

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the vast expanse of space. Thankfully, through some impressive detective

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work and engineering expertise, NASA successfully re established contact with

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Voyager one on October twenty fourth. The spacecraft appears to

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be stable, so engineers are still working to understand exactly

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what triggered these issues in the first place. This incident

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serves as a reminder of both the remarkable longevity of

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the Voyager mission, now over forty seven years old, and

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the increasing challenges of maintaining such aging spacecraft in the

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uncharted territory of interstellar space. It's truly remarkable that we

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can still communicate with this pioneer of space exploration, even

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as it ventures further into the unknown than any human

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made object in history. In a significant step for China's

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space program, a new crew of three astronauts successfully launched

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to the Tiangong space station in the early hours of

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Wednesday morning. The Shenzho nineteen mission lifted off at four

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to twenty seven am local time from the Jukan Satellite

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Launch Center in northwest China, marking another milestone in the

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nation's ambitious space exploration journey. Among the crew is thirty

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four year old Wang houseI, who joins the elite ranks

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as China's third woman to participate in a crude space mission.

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What makes Wang particularly noteworthy is her role as the

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country's only female space flight engineer, bringing unique technical expertise

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to the mission. The crew is led by veteran astronaut

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Kai Suje, a forty eight year old former Air Force

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pilot who brings valuable experience from his previous stint aboard

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Tiangong during the Shenzho fourteen mission in twenty twenty two.

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Rounding out the team is thirty four year old Songlingdong,

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completing this carefully selected trio of space explorers. During their

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approximately six months stay aboard Tchiangong, the crew will conduct

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various scientific experiments, with a particularly interesting focus on testing

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special bricks made from materials that simulate lunar soil. This

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research directly ties into China's broader ambitions of establishing a

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human presence on the Moon by twenty thirty. These lunar

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soil experiments are especially significant as scientists hope to eventually

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use actual Moon materials for constructing their plan lunar base,

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potentially revolutionizing how we approach off world construction. This mission

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represents more than just another crew rotation. It's a crucial

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stepping stone in China's expanding space program. The country has

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made remarkable progress in recent years, including successfully landing rovers

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on both Mars and the Moon, and establishing Tiangong as

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their crown jewel in low Earth orbit. The new crew

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is scheduled to return to Earth in late April or

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early May of next year, continuing the steady rhythm of

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operations that has characterized China's presence in space. Their mission

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demonstrates China's growing capabilities in space exploration and their commitment

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to maintaining a continuous human presence in orbit. Let's move

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further out into space now a lot further fascinating new

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research has revealed that Miranda, one of Uranus's smallest major moons,

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might be hiding something remarkable beneath its bizarre surface, a

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subsurface ocean. What makes this discovery particularly surprising is Miranda's

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small size, at just four hundred and seventy one kilometers

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in diameter. The Moon's surface has long puzzled scientists with

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its unique patchwork of jumbled terrain, including what might be

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the tallest cliff in our entire Solar system, a massive

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twenty kilometer drop called Verona rupus. But it's what lies

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beneath this chaotic surface that's now catching researcher's attention. Using

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advanced computer modeling, scientists worked backward from Miranda's current surface

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features to understand what could have created such a complex landscape.

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Their findings suggest that beneath the Moon's icy crust, which

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is likely less than thirty kilometers thick, there could be

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an ocean up to one hundred kilometers deep. This hidden

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ocean probably existed in its fullest form between one hundred

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and five hundred million years ago, kept liquid by tidal

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heating from gravitational interactions with Uranus's other moons. When these

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moons were in orbital resonance with each other, their gravitational

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tugs created enough heat to maintain liquid water beneath Miranda's surface.

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What's particularly intriguing is that the ocean might still exist today,

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albeit in a thinner form. Scientists believe if it had

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completely frozen, we would see evidence of expansion cracks on

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the surface, features that are notably absent. This discovery puts

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Miranda in the company of other potential ocean worlds like

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saturns Enceladus, and Jupiter's Europa, expanding our understanding of where

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liquid water might exist in our Solar system. It's a

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reminder that even in the coldest, most distant corners of space,

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the conditions for potential habitability might be more common than

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we once thought. The findings are even more remarkable considering

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they're based on decades old data from Voyager two's brief

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nineteen eighty six flyby. It shows how modern analytical techniques

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can reveal new secrets from limited historical observations, while also

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highlighting the need for new missions to these distant worlds. Now,

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let's double back to Mars, where new findings suggest there

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may have been life there a lot more recently than thought.

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New research from Harvard's Paleomagnetics Lab has dramatically shifted our

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understanding of Mars's potentially habitable past. Scientists have discovered that

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the red planet's protective magnetic field may have persisted hundreds

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of millions of years longer than previously thought, lasting until

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about three point nine billion years ago, rather than disappearing

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around four point one billion years ago. This protective magnetic field,

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generated by convection in the planet's iron core, much like

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Earth's field today, would have played a crucial role in

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defending the Martian surface from harmful cosmic rays. The longer

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this shield remained active, the more time there would have

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been for potential life to develop and thrive. The research

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team reached this conclusion through innovative analysis of Mars's impact basins.

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These massive craters have traditionally been thought to show weak

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magnetic signatures because they formed after Mars's magnetic field had

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already disappeared. However, the Harvard team proposes a different explanation.

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These weak signatures could instead be evidence that the craters

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formed during magnetic pole reversals, similar to the way Earth's

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magnetic poles occasionally flip. By studying the famous Allen Hills

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meteorite using a quantum diamond microscope, the researchers found evidence

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supporting their theory of a longer lasting magnetic field. This

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new timeline suggests Mars remained protected from harmful radiation during

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a crucial period when we believe the planet still had

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liquid water on its surface. The implications are profound. If

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Mars maintained its protective magnetic field for hundreds of millions

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of years longer than we thought, it means the window

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for potential life to emerge and evolve was significantly larger.

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The planet would have remained warmer and wetter for longer,

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with its atmosphere better protected from being stripped away by

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solar radiation. This research challenges our previous assumptions about Mars's

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early history and opens up new possibilities about how long

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the red planet might have been capable of supporting life.

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It's another piece in the complex puzzle of Mars's transformation

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from a potentially habitable world to the cold, dry planet

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we see today. Now, speaking of life on Mars, how

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about this for an intriguing idea in the future. Here's

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how we could one day see trees growing on the

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red sands of Mars, at least according to fascinating new

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research that maps out the conditions needed to make it possible,

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and the findings might surprise you. Scientists at the Warsaw

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University of Technology have been crunching the numbers on exactly

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how much we'd need to alter Mars's atmosphere to support

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tree growth. They looked at everything from temperature requirements to

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atmospheric pressure and the length of growing seasons needed. Interestingly,

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the first Martian forests likely wouldn't take root where you

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might expect. While on Earth, trees grow best in tropical regions,

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Mars's unique orbital characteristics mean the planet's southern hemisphere experiences longer,

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warmer somemait. This, combined with the extremely low elevation of

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the Hellas Basin, makes it the most promising location for

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the first Martian trees. For trees to survive, Mars would

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need significantly higher temperatures with much less dramatic data to

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night swings than it experiences now. The growing season would

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need to last at least one hundred and ten Martian days.

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The researchers mapped out precisely how much carbon dioxide would

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be needed in the atmosphere to create these conditions through

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the greenhouse effect. The whole concept might sound like science fiction,

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but this research provides concrete numbers and specific locations that

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could guide future terraforming efforts. While we're still a long

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way from planting the first Martian forest, understanding exactly what

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it would take brings us one step closer to potentially

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transforming the Red planet into a second home for Earth life.

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Of course, there are still major hurdles to overcome, including

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establishing sufficient oxygen levels and protecting any plants from harmful radiation.

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But having a clearer picture of the temperature and atmospheric

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requirements gives future Mars colonists a better road map for

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what might be possible. Well, it seems our hopes for

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a spectacular Halloween sky show have been dashed. Comet C

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twenty twenty four S one Atlas, which initially showed such

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promising brightness after its discovery in late September, has met

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a fiery end in the Sun's scorching embrace. The comet

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gave us early warning signs that it might not survive

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its close solar encounter. After an initial bright outburst when

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it was first spotted, it began to fade considerably in

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early October. Still, astronomers held out hope that it might

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join the rare ranks of sungrazers that survived their close

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solar passages. Unfortunately, when the comet entered the field of

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view of NASA's Soho Solar Observatory yesterday morning, it was

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already showing signs of breaking apart. As it approached within

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just three hundred thirty thousand, six hundred miles of the

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Sun's surface, about one and a half times the distance

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between Earth and the Moon, the comet completely disintegrated. What

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makes this particularly interesting is that calculations suggest this comet

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had an orbital period of about nine hundred and fifty

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three years. This means it may have visited the inner

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Solar System before nearly a millennium ago, only to meet

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its end on this final journey. While S one Atlas

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joins the thousands of comets that have perished in similar

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solar encounters. It's worth noting that some sungrazers do survive.

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The most famous example is perhaps comet Lovejoy, which in

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twenty eleven survived passing just eighty seven thousand miles from

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the Sun's surface and went on to provide spectacular views

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for observers on Earth. These close encounters with the Sun

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give us valuable insights into both the composition of comets

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and the extreme conditions near our star. While we may

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have missed out on a bright Halloween comet this year,

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the next great comet could appear at any time. That's

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the unpredictable nature of these cosmic visitors that makes them

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so fascinating to observe. And that wraps up our coverage

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for today. I'm Anna and thank you for joining me

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for another episode of Astronomy Daily. If you're hungry for

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more space content, head over to Astronomy Daily dot io,

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