The thread for space cadets!

martians do not call them that way anyways .
 
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Elon's spaceship apparently will be called Deimos. Deimos was the personification of terror, and a brother of Phobos (fear). Both were sons of Ares.
I think it shares the root with the much more prominent "deinos" (frightening/terrible), from which "dinosaur" was coined.


I'm reading this as the launch platform being called Deimos, since it appears to be a vessel of sorts. As much as an oil rig is a vessel that is.
 
It's weird that Roman god has Greek sons.

Latin terms (also names) are used in a few disciplines, such as plant and animal life groups. The local system planets too, but that is hardly an order; just a few names. For the rest the greek names are used either because they were already used in antiquity (eg by Aristotle when he created the respective discipline) or were picked up or coined later on by non-greeks (a large number of cases, this is ongoing).

The moons Deimos and Phobos would have been named much later, and it seems no one cared what they were called in latin, but it made sense they would be sons of Ares :)

Often you would see the latin and greek name together, but as supposed group and subgroup. I think "corvus corax" (a crow) just means "crow (latin) crow (greek)".
 
BBC said:
Venus: Nasa announces two new missions

Nasa has announced that it is sending two new missions to Venus in order to examine the planet's atmosphere and geological features.

The missions, which have each been awarded $500m (£352m) in funding, are due to launch between 2028 and 2030.

Nasa administrator Bill Nelson said the missions would offer the "chance to investigate a planet we haven't been to in more than 30 years".

The last probe to visit the planet was the Magellan orbiter in 1990.

However other vessels have made fly-bys since then.

The missions were picked following a peer-review process and were chosen based on their potential scientific value and the feasibility of their development plans.

"These two sister missions both aim to understand how Venus became an inferno-like world, capable of melting lead at the surface," Mr Nelson said.

Venus is the second planet from the sun and the hottest planet in the solar system with a surface temperature of 500C - hot enough to melt lead.

The Davinci+ (Deep Atmosphere Venus Investigation of Noble gases, Chemistry, and Imaging) mission will measure the planet's atmosphere to gain insight into how it formed and evolved. It will also aim to determine whether Venus ever had an ocean.

Davinci+ is expected to return the first high resolution images of the planet's "tesserae" geological features. Scientists believe these features could be comparable to continents on Earth and could suggest that Venus has plate tectonics.

The second mission, Veritas (Venus Emissivity, Radio Science, InSAR, Topography, and Spectroscopy), will map the planet's surface to understand its geologic history and investigate how it developed so differently than Earth.

It will use a form of radar to chart surface elevations and discover whether volcanoes and earthquakes are still happening.

"It is astounding how little we know about Venus, but the combined results of these missions will tell us about the planet from the clouds in the sky through the volcanoes on its surface all the way down to its very core," said Tom Wagner from Nasa's Planetary Science Division.

"It will be as if we have rediscovered the planet," he added.
https://www.bbc.com/news/science-environment-57339355
 
No one's gonna shoot it down. It'll burn through the atmosphere and hit something. It won't cause any real damage unless it lands on a house or a bus. It's no big deal, dunno why news media are milking it.
It is irresponsible to not de-orbit something this large, and it doesn't happen very often. This core stage is not as heavy as Skylab was but it was in the same class - things this big don't come down very often and given this was the core stage of a rocket (rather than a decades old space station), it is pretty trivial for it to be made to be able to de-orbit itself. The Chinese just didn't bother, because they don't care.

TIL: While there is right now this kerfuffle about the Chinese rocket's re-entry, it seems that the ESA has let all of their rockets crash down uncontrolled (due to the outdated rockets used).
https://www.hou.usra.edu/meetings/orbitaldebris2019/orbital2019paper/pdf/6090.pdf
That's not good, but the Ariane 5 upper stage is very small and very little of it (if anything) survives reentry. It's also a very old rocket design from a time before any government cared about the environment. That doesn't excuse this behavior, but it does put it into context compared to the massive (and brand spanking new) Long March 5 core stage which was designed in an age where governments (and laypeople) are very much aware of how crummy it is to drop rocket stages on other countries. But China regularly dumps rocket stages on their own villages (filled with toxic fuels no less) so it's no surprise they took such a blase attitude to de-orbiting this new rocket.
Yea it just seems real ******* odd that this launch is blabbered about everywhere, but this happens all the time.

This was a bit close to the Maldives. but otherwise, was nothing special.
It does not happen all the time. Very few objects this large are placed into orbit, much less placed into orbit and then allowed to decay naturally. Yes, second stages do make it to orbit, but modern ones (like the Falcon 9) are nearly always deorbited. And this Chinese core stage is not a tiny second stage, it's the massive core stage of the rocket, minus the side boosters. It's an order of magnitude larger than second stages and thus a hazard to anything on the ground. Most second stages that are not de-orbited will completely burn up on reentry, but not this rocket. That's what makes it so irresponsible and notable.

This simulation shows how two supermassive black holes distort and redirect light emanating from their accretion disks — the maelstrom of hot gas that surrounds each one. To create the visualization, astrophysicist Jeremy Schnittman, at NASA’s Goddard Space Flight Center in Greenbelt, Maryland, used a supercomputer to calculate the path taken by light rays from the accretion disks as they made their way through the warped space-time around the black holes.

MP4 version
The visualizations in Interstellar look very similar to this and for good reason - Kip Thorne (famous astrophysicist) wrote papers on the visualization software he helped write as it was based on real black hole physics. At the time it was the most accurate visualization of a black hole ever made even though ultimately it was just a special effect for a movie.
 
nvm
 
space-exploration-china-mars.JPG

https://www.cbc.ca/news/science/chinese-mars-rover-1.6061911
 
https://www.sciencenews.org/article/galaxy-giant-arc-3-billion-light-years-long-cosmology-space

A giant arc of galaxies appears to stretch across more than 3 billion light-years in the distant universe. If the arc turns out to be real, it would challenge a bedrock assumption of cosmology: that on large scales, matter in the universe is evenly distributed no matter where you look.

“It would overturn cosmology as we know it,” said cosmologist Alexia Lopez at a June 7 news conference at the virtual American Astronomical Society meeting. “Our standard model, not to put it too heavily, kind of falls through.”
 
congragulations to USAF for its supposed first interception of the Chinese Stealth Bomber reportedly yet to fly and certainly unable to reach Hawaii , or is it geese that migrate or is it UFOs or is it a mirage ?
 
Betelgeuse is not about to blow up after all (Paper, paywalled)

A team using the Very Large Telescope (VLT) in Chile say the cause of the abruptly darkening in late 2019 / early 2020 was almost certainly a giant dust cloud between us and the star.

Our overall idea is that there was a cool spot on the star [caused by large convective cells] which, because of the local drop in temperature, then caused gas ejected previously to condense into dust. So, the cool spot on the surface would initially make the star look dimmer to us. But then this condensation of dust would add to the rapid drop in brightness of the star. - Emily Cannon, Katholieke Universiteit Leuven in Belgium.
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https://www.sciencenews.org/article/galaxy-giant-arc-3-billion-light-years-long-cosmology-space

A giant arc of galaxies appears to stretch across more than 3 billion light-years in the distant universe. If the arc turns out to be real, it would challenge a bedrock assumption of cosmology: that on large scales, matter in the universe is evenly distributed no matter where you look.

“It would overturn cosmology as we know it,” said cosmologist Alexia Lopez at a June 7 news conference at the virtual American Astronomical Society meeting. “Our standard model, not to put it too heavily, kind of falls through.”

what happens if you swing a bat thru the air? It creates a vacuum behind it sucking in air outside of the bat's path. Maybe any 'linearesque' pattern might indicate the bat's path.
 
pentagon denies they intercepted any Chinese Stealth bombers , despite the 2012 or 3 overflight of the original American prototype in company of two B-2Cs pictured over Texas and posted online in daylight . lt was Russians exercising in the Pasific and some plane American military was not tracking which hadc become noticeable to civilian FAA . Funnily enough ı was reading the original blog release with the latest Pearl Harbour movie on TV ...
 
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