Astronomy and Planetary Science Thread

[NMaude]

Anton Petrov has an interesting what-if video about the possibility of being killed by micro-blackholes:

Hello and welcome! My name is Anton and in this video, we will talk about if it's possible to be killed by a black hole
Links:
https://arxiv.org/pdf/2502.09734https://www.youtube.com/redirect?event=video_description&redir_token=QUFFLUhqbFdabnYyeENRVTgyNGVPQWhXend3VzRFcGttUXxBQ3Jtc0ttY2JFWmx0TUVIZktTY3BSWGhjblZNVC0xSkVyUS03X3lXaUJibWVKVWZZSjJ3QXAzNmZDcFlabUlGcW9ITjRWRTdRZEtHdU14cXBuRjhpOTJtQkV4QlVrM3pidWthUElsVE5jY194R0Q1YXlJbmxvTQ&q=https://arxiv.org/pdf/2502.09734&v=neYzkyLHui0
Other videos:

View: https://www.youtube.com/watch?v=fchKB7eldCM

• Stars That Swallowed Microscopic Blac...
https://www.youtube.com/watch?v=W8WlxumOsHU
• Stephen Hawking Proven Wrong - Black ...

• Hawking Radiation Explained - This If...
• Black Hole Experiment Using Sound Cre...
• Major Study Suggests Stephen Hawking ...

View: https://www.youtube.com/watch?v=qhVvihYJBEs&pp=0gcJCR0AztywvtLA

• What Happened in Tunguska in 1908? Ne...
https://www.youtube.com/watch?v=f5Qtna_Ldww
• Invisible Stars Found and Analyzed Us...

View: https://www.youtube.com/watch?v=f5Qtna_Ldww

#blackhole #earth #impacthttps://www.youtube.com/hashtag/impact

0:00 Murder mystery but with black holes
0:40 What are primordial black holes?
4:00 Detecting these black holes
5:50 What if it passes through a person?
6:45 Tidal interactions inside body
8:10 Main problem: shock wave
9:15 Never seen though, so what does it mean?
10:20 Conclusions

 

[Justo Miranda]

It's a Chimpanzee NOT a monkey, Chimps are apes. The easy way to tell whether or not a primate is an Ape or monkey is if it has a tail, Monkeys have tails Apes don't.

To have or not to have, that is the question

 

[Flyaway]

I cannot believe it’s almost thirty years since this announcement was made, where has the time gone!!!

NASA’s Most Controversial Rock:

View: https://youtu.be/2Box8dkz6cQ?si=tkEeQQaFnYS1xdRu

 

[NMaude]

I cannot believe it’s almost thirty years since this announcement was made, where has the time gone!!!

NASA’s Most Controversial Rock:

View: https://youtu.be/2Box8dkz6cQ?si=tkEeQQaFnYS1xdRu

I remember the big flap on the six o'clock news back in the 90s (Hard to believe it's been about 30 years) when NASA made the announcement.

On another note Scott Manley has a video out about the feasibility of using balloons to explore other planets:

What planets and moons have enough atmosphere to be explored via aircraft, and what kind of aircraft work for long term missions. It turns out that balloons are the only option for gas giants, and likely the best option for Venus - places where 'the floor is lava'.

Aside from Venus there also the Gas-giants (Although a balloon-probe in Jupiter would need a LOT of radiation hardening to survive radiation from Jupiter's inner radiation-belt.

Edit: a hydrogen-balloon probe would be good for long-term aerial exploration of Mars.

 

[NMaude]

Astronomers have discovered a potential supermassive blackhole in the Large Magellanic Cloud and it's slinging hypervelocity stars towards the Milky Way galaxy, from NASASpaceNews:

Astronomers may have found a supermassive black hole in the Large Magellanic Cloud, challenging our understanding of galaxy evolution! This discovery, based on hypervelocity stars' trajectories, could mean that small galaxies hide more of these cosmic giants than we thought. Watch to learn how this changes our view of the universe!

Paper link: https://arxiv.org/abs/2502.00102https://www.youtube.com/redirect?ev...ttps://arxiv.org/abs/2502.00102&v=QzBoOHtK4Yk

Chapters:
00:00 Introduction
00:50 Hypervelocity Stars and Their Origins
02:49 Evidence for a Supermassive Black Hole in the LMC
04:39 Implications for Galactic Evolution and Future Research
07:22 Outro
07:45 Enjoy

 

[Flyaway]

WEBB TELESCOPE CAPTURES ITS FIRST DIRECT IMAGES OF CARBON DIOXIDE OUTSIDE SOLAR SYSTEM

The James Webb Space Telescope has captured its first direct images of carbon dioxide in a planet outside the solar system in HR 8799, a multiplanet system 130 light-years away that has long been a key target for planet formation studies.

The observations provide strong evidence that the system's four giant planets formed in much the same way as Jupiter and Saturn, by slowly building solid cores. They also confirm Webb can do more than infer atmospheric composition from starlight measurements—it can directly analyze the chemistry of exoplanet atmospheres.

Webb telescope captures its first direct images of carbon dioxide outside solar system

James Webb Space Telescope observations suggest key giant exoplanets likely formed like Jupiter and Saturn

hub.jhu.edu

Related paper:

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