Nov. 19, 2024

S03E210: Supersonic Spacecraft, Cosmic Cannibalism, and Mars' Mysteries

S03E210: Supersonic Spacecraft, Cosmic Cannibalism, and Mars' Mysteries

Astronomy Daily - The Podcast: S03E210
Welcome to Astronomy Daily, your Daily dose of space and Astronomy news. I'm your host, Anna, and today we have an exciting lineup of stories that cover everything from supersonic spacecraft to mysterious objects...

Season 3
Astronomy Daily - The Podcast: S03E210
Welcome to Astronomy Daily, your Daily dose of space and Astronomy news. I'm your host, Anna, and today we have an exciting lineup of stories that cover everything from supersonic spacecraft to mysterious objects in space.
Highlights:
- Supersonic Breakthrough: Discover Dawn Aerospace's remarkable achievement with their MK11 Aurora spacecraft, which broke the sound barrier during a test flight in New Zealand. Learn about its innovative design, capable of reaching the edge of space twice in a single day, and its potential impact on reusable space technology.
- Webb Telescope's Discovery: Unveil the groundbreaking findings from NASA's James Webb Space Telescope in the Orion Nebula, where it has confirmed the existence of protoplanetary disks around brown dwarfs. Explore how this discovery reshapes our understanding of these cosmic objects and their potential to host planetary systems.
- China's Space Advances: Explore China's new Haolong spacecraft, a reusable cargo shuttle entering the engineering phase. Understand its role in supporting China's Tiangong Space Station and its significance in the rapidly expanding Chinese commercial space industry.
- Mars Exploration Update: Get the latest on NASA's Curiosity rover as it captures a 360-degree panorama of the Gades Valles Channel on Mars. Delve into the intriguing discovery of sulfur stones and the rover's next target, the Boxwork formation, which could provide insights into Mars' wet history.
- Mars Landing Breakthrough: Learn about the collaboration between NASA and SpaceX that has led to a breakthrough in Mars landing technology. Discover how supersonic retro propulsion could solve the challenge of landing human-scale missions on Mars.
- Celestial Cannibalism: Uncover a fascinating study revealing that up to a third of stars may have devoured their own planets. Explore how this celestial phenomenon explains differences in chemical compositions among sibling stars.
For more cosmic updates, visit our website at astronomydaily.io. Sign up for our free Daily newsletter to stay informed on all things space. Join our community on social media by searching for #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.
Become a supporter of this podcast: https://www.spreaker.com/podcast/astronomy-daily-the-podcast--5648921/support.
WEBVTT

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Welcome to Astronomy Daily, your daily dose of space and

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

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an exciting lineup of stories covering everything from supersonic spacecraft

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to mysterious objects in space. We'll be exploring groundbreaking achievements

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in aerospace, fascinating discoveries from the far reaches of our

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Solar system, and intriguing new research that's changing our understanding

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of the Cosmos. Let's get started. In an exciting development

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from the aerospace industry, Dawn Aerospace has achieved a remarkable

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milestone with their MK eleven Aurora spacecraft during a test

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flight near Mount Cook in New Zealand South Island on

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November twelfth. The craft successfully broke the sound barrier, reaching

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mock one point one while climbing to an impressive altitude

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of eighty two thy five hundred feet that's about twenty

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five kilometers up. This achievement marks the first time a

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civil aircraft has reached supersonic speeds since the retirement of

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the iconic concord, making it a significant moment in aviation history.

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What makes the Aora particularly special is its innovative design

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and capabilities. The spacecraft is engineered to perform something that's

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never been done before, reaching the edge of space twice

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in a single day. According to Stephan Powell, Dawn Aerospace's

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chief executive, the Aurora is designed to hit speeds of

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mock three point five during both ascent and re entry.

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The company, which maintains headquarters in both the Netherlands and

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New Zealand, has been methodically testing this latest model over

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recent months, and these results demonstrate the immense potential of

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their rocket powered aircraft technology. The Aurora also set another

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impressive record during its test flight, becoming the fastest aircraft

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ever to climb from ground level to twenty kilometers. This

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breakthrough represents a significant step forward in the development of

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reusable space technology, potentially opening new possibilities for more frequent

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and efficient access to space. Next up, NASA's James Webb

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Space Telescope has made another groundbreaking discovery, this time in

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the Orion nebula, where it has confirmed something that has

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intrigued astronomers for decades. Scientists have found that some of

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the protoplanetary disks they've been observing actually surround brown dwarfs,

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fascinating objects that exist in a cosmic gray area between

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stars and planets. These brown dwarfs, sometimes called failed stars,

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lack the mass needed to sustain hydrogen fusion in their cores.

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Despite being too small to be proper stars, they're still

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significantly larger than planets. The web Telescope's observations have revealed

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that these objects are surrounded by disks of gas and dust,

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similar to the protoplanetary disks we see around young stars.

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The study focused on several objects in the Orion nebula,

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which lies about one thoy three hundred light years from Earth.

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Using webs advanced infrared capabilities, researchers confirmed twenty objects as

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brown dwarfs, with some having masses as small as five

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times that of Jupiter. What's particularly exciting is that two

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of these brown dwarfs were found to have protoplanetary discs

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that were previously spotted by the Hubble Space Telescope. This

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discovery is reshaping our understanding of how these cosmic objects

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form and evolve. The presence of these disks suggests that

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brown dwarfs might form in a similar way to stars,

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and could potentially host their own planetary systems. The findings

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are especially significant because they represent some of the coolest

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and least massive protoplanetary discs ever detected. These observations have

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only scratched the surface of what we might learn about

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brown dwarfs in the Orion nebula, With hundreds more potential

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brown dwarfs waiting to be studied, Web's continued observations could

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help us better understand these mysterious objects and their relationship

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to both stars and planets. China made waves at their

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International Aviation and Aerospace Exhibition last week with the announcement

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of their new so how long spacecraft that's Chinese for dragon.

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This reusable cargo shuttle has officially entered the engineering phase

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and represents a significant step forward in China's space capabilities.

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The how Long is notably compact compared to NASA's retired

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Space Shuttle, measuring just ten meters in length with an

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eight meter wingspan. But don't let its smaller size fool you.

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This autonomous spacecraft is packed with cutting edge aviation technologies

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and has been specifically designed to provide vital logistical support

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for China's Tiangong space station. According to chief designer Fang Yuanping,

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the how Long will launch into orbit aboard a commercial

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rocket Once in space, it will deploy solar panels and

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dock with Tiangong, allowing Tai kannots to access its cargo bay.

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After completing its mission, it will make an atmospheric re

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entry and land horizontally on a runway, much like an aircraft.

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The spacecraft can then undergo maintenance and prepare for its

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next mission. The how Long is one of two winning

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designs selected by the China Manned Space Agency in their

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search for low cost commercial cargo spacecraft. This development comes

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as China's commercial space industry continues to expand rapidly, with

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market projections suggesting it could reach a value of over

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three hundred twenty billion dollars by the end of this year.

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This new cargo shuttle marks another milestone in China's growing

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space program, demonstrating their commitment to developing sustainable and reusable

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space technologies that could play a crucial role in their

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future space exploration plans. Let's get a Mars update. NASA's

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Curiosity Rover is preparing for an exciting new chapter in

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its Mars exploration, but not before capturing one final look

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at an area that's left scientists scratching their heads. The

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rover recently completed a stunning three hundred and sixty degree

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panorama of the Gaydees Vallis Channel, an area it's been

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studying for the past year that's proven to be full

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of surprises. Perhaps the most intriguing discovery in this region

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has been a field of pure soulf for stones, something

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never before seen on Mars. When Curiosity rolled over one

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of these mysterious rocks, it revealed bright yellow crystals inside.

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What makes this finding particularly puzzling is that on Earth,

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sulfur deposits are typically associated with volcanic activity or hot springs,

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yet scientists haven't found evidence of either in this area

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of Mount Sharp. The rover is now setting its sights

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on an intriguing new target, a formation known as the

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box work. When viewed from orbit, these features look like

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spider webs stretching across the Martian surface. Scientists believe they

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formed during Mars's final wet period, when mineral rich water

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seeped into rock fractures and hardened. As the surrounding rock

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eroded away, these mineral filled cracks remained, creating the distinctive

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weblike patterns we see today. This formation is particularly exciting

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because it spans an impressive area of six to twelve

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miles and could provide valuable insights into Mars' transition from

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a wet world to the dry planet we see today.

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Even more intriguingly, the environment that created these features bears

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similarities to places where early Earth microbes could have thrived,

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making it a compelling target for understanding Mars's potential for

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past life. As Curiosity embarks on this month's long journey

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to the Boxwork Formation, it leaves behind the Geddy's Vallis

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Channel with more questions than answers about its sulfur stones

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and how this channel formed so late in mars climate history.

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But that's the nature of scientific exploration. Each discovery opens

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the door to new mysteries waiting to be solved. Speaking

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of Mars and looking to our future, there a fascinating

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breakthrough in Mars landing technology has emerged through an unexpected

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collaboration between NASA and SpaceX, potentially solving what was once

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thought to be an impossible challenge. Back in two thousand

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and seven, even NASA's top landing engineers were skeptical about

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our ability to land human scale missions on Mars. Problem.

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Mars's atmosphere is too thin to land like we do

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on Earth, but too thick to use lunar style landing methods.

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The key challenge has been what engineers call the supersonic

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transition problem. Any spacecraft heading to Mars arrives at incredibly

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high speeds and needs to slow down dramatically in just

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a few minutes. For context, the Perseverance Rover was traveling

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at a blistering twelve thousand, one hundred miles per hour

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when it hit the Martian atmosphere. But a solution has

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emerged from an unlikely source, SpaceX's efforts to land their

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Falcon nine rocket boosters back on Earth. When SpaceX began

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testing supersonic retropropulsion firing rockets backward while moving at supersonic speeds,

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NASA saw an opportunity. The Space Agency partnered with SpaceX

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to study this technique, and what they discovered was remarkable.

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Rather than causing instability as feared, firing engines backwards during

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supersonic flight actually creates a protective bubble around the spacecraft,

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shielding it from buffeting and excess heating. This discovery has

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completely changed the outlook for landing large payloads on Mars.

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While significant challenges remain, such as protecting engines from debris

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and dealing with Mars's unpredictable weather, this breakthrough has transformed

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what once seemed impossible into an engineering challenge that can

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be solved. As one NASA engineer put it, they're essentially

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doing what Buck Rogers showed us in the nineteen thirties,

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firing engines backwards while going really fast and time for

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one more intriguing discovery. Today, in a fascinating new study,

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astronomers have discovered that up to a third of stars

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may have devoured some of their own planets. This celestial

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cannibalism helps explain a long standing mystery about why some

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stars born from the same cosmic nursery show unexpectedly different

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chemical compositions. When stars form from the same giant molecular cloud,

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they should have nearly identical metal content. However, detailed observations

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have revealed that some sibling stars show pronounced differences in

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their metallicity, the abundance of elements heavier than hydrogen and helium.

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The research suggests that these differences arise when stars consume

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rocky planets that orbit too close to them. These planets

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rich in metals and other heavy elements effectively pollute their

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parent stars, leaving behind a distinctive chemical signature that astronomers

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can now detect. The study focused particularly on ultra short

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period planets, worlds that orbit extremely close to their stars,

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completing a circuit in just a few hours. While these

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planets are rare today, found around only about half a

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percent of Sun like stars, the evidence suggests they may

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form much more frequently, but often meet a fiery end.

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The process can happen in several ways, but the most

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common appears to be through what scientists call low eccentricity migration,

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where planets in multiplanet systems gradually spiral inward toward their star.

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This cosmic dance typically occurs between one hundred million and

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one billion years after the planetary system forms. This discovery

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not only helps explain the mysterious metal content differences between

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sibling stars, but also provides new insights into the dangerous

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lives of planets that orbit too close to their stars.

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It seems that in many planetary systems, what we observe

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today may be just the survivors of a much more

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crowded early history. That's all for today's episode. Of Astronomy Daily.

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I'm anna and thank you for joining me on this

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journey through the latest developments in space science and exploration.

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From supersonic spacecraft to planet devouring stars. It's been another

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fascinating day in astronomy. Don't forget to visit our website

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at Astronomydaily dot io, where you can sign up for

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our free daily newsletter and catch up on all the

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latest space and astronomy news with our constantly updating news feed.

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While you're there, you can also listen to all our

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back episodes. Want to stay connected, you can find us

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and wondering about the mysteries of our cosmic neighborhood. I'm

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anna and this has been Astronomy Daily Sunday. Star is

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the Toll, Star is Star