astronomy

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NegativeLookBehind, w The US government seems serious about developing a lunar economy
@NegativeLookBehind@lemmy.world avatar

What’s the USD to MOONBUX conversion rate?

Rascabin, w Juno measures oxygen production on Europa - NASASpaceFlight.com

Man, we were warned not to go to Europa!

thebardingreen, w Juno measures oxygen production on Europa - NASASpaceFlight.com
@thebardingreen@lemmy.starlightkel.xyz avatar

It’s interested that they say “oxygen could travel below the ice and support life.”

I would expect life on Europa to be anaerobic, given the obvious lack of photosynthesis.

kat_angstrom, w The mathematically perfect exoplanet system — a great place to search for alien tech

Damn, the article never actually defined what they meant by “mathematically perfect” :(

kittehx,
@kittehx@lemmy.blahaj.zone avatar

The first link leads to an older article that does explain it. What they mean is that the planets’ orbits are in resonance, which means that their orbital periods are related by integer ratios. (For example one planet completing exactly three orbits in the time it takes another to complete two)

state_electrician, w Saturn's largest moon most likely uninhabitable

There goes the real estate market.

Deebster, w The Moon Illusion: Why Does the Moon Look So Big Sometimes? - NASA Science
@Deebster@programming.dev avatar

Here’s the Ponzo illusion that they describe instead of just including:
Ponzo illusion gif from Wikipedia

Tristaniopsis, w A sleuthing enthusiast says he found the US military’s X-37B spaceplane

If he’s an American or ally, why doesn’t he STFU?

vzq,

Because in a democracy we have a right to do research and publish our results.

Shittyretar_,

Despite the secrecy, it’s difficult to imagine the US military’s adversaries in China and Russia didn’t already know where the spaceplane was flying.

From the article.

OsrsNeedsF2P,

If he’s an American

Because many Americans realize their army terrorizes most of the world?

verity_kindle,
@verity_kindle@lemmy.world avatar

Our navy terrorizes most of the world. The US Army just figured out Class A uniforms. There is no reason why the Bundeswehr should outshine us in uniform design. It’s a tailoring gap we must overcome before we can conquer ze world. So you have nothing to worry about, except coming up with better comments.

danl,

It’s not a secret, just hard for amateurs to do. No doubt states with space monitoring equipment always knew. He just did it with a camera in his backyard and his laptop.

Also, he’s Finnish.

Amateur observations of the spaceplane indicate it is flying in a highly elliptical orbit ranging between 201 and 24,133 miles in altitude (323 and 38,838 kilometers). The orbit is inclined 59.1 degrees to the equator.

This is not far off the predictions from the hobbyist tracking community before the launch in December. At that time, enthusiasts used information about the Falcon Heavy’s launch trajectory and drop zones for the rocket’s core booster and upper stage to estimate the orbit it would reach with the X-37B spaceplane.

Tristaniopsis,

Ok fair enough.

reverendz, w How Venus Ended Up with a Mini-Moon Named Zoozve

Love this story.

mrlee, w For your processing pleasure: The sharpest pictures of Jupiter's volcanic moon Io in a generation

Looks thicc

remotelove, w 'Old smokers': Strange new type of star discovered in Milky Way

Betelgeuse is a red giant doing the same thing as described in this article? I wonder what the difference is.

Boddhisatva,

Good question. According to this article, the process going on with Betelgeuse does sound like the same or very similar to the process described in OP’s article.

The great dimming [of Betelgeuse] was caused by the star spitting out a lump of gas and dust, like chewing gum: or what scientists call a “surface mass ejection” caused by an “anomalously hot convective plume”.

OP’s article doesn’t say that the Old Smokers they found are red super-giants but since they called them old smokers, I’m inclined to think that they are. Also because they say that smoke contains much higher levels of heavy elements than is common in the region which would also be consistent with older stars. The article doesn’t say whether or not the stars puff out smoke on a regular schedule like Betelgeuse does, but then maybe they haven’t been watching them long enough to see a pattern yet.

It does seem like they found a bunch of older stars that are pre-supernova, just like Betelgeuse is, and burping out clouds of gas and dust.

remotelove,

I missed it at first as well. The second paragraph implies they are red giants. However, there is a distinction between a red giant and a red super-giant, if that is what you mean.

The “peculiar” puffing behavior of these stars has never been seen before in such red giants, astrophysicist Philip Lucas told AFP.

Boddhisatva,

Ah, yes, I missed that. Thank you.

remotelove,

So, in my typical nature, I went right to the source and shot off an email to Professor Philip Lucas from the University of Hertfordshire. He was one of the primary researchers for the original paper. (P.W. Lucas et al.)

If he responds, I’ll post it here.

remotelove,
Boddhisatva,

Awesome! Thanks for contacting the professor and posting the reply.

remotelove,

Of course! I was super curious myself.

Teachers generally want to teach so I have had great success reaching out to various people like that.

I don’t abuse that, of course. Keeping questions short and being respectful of their time is a huge plus, in my experience.

diykeyboards, w We're heading for Venus: ESA approves EnVision

But still we stand tall

Alkaseltzer028,

'Cause maybe they’ve seen us

Illuminostro,

And they’ll eat us all, yeah…

1984, w Japan's precision moon lander has hit its target, but it appears to be upside-down
@1984@lemmy.today avatar

Jian Yang!!

nooneescapesthelaw, w NASA finally figures out how to open a $1-billion canister

Pics of the sample in this article

nasa.gov/…/nasas-osiris-rex-curation-team-reveals…

reflex, (edited ) w Frozen water discovered on Mars could fill Red Sea
@reflex@kbin.social avatar
CommieCretzl, w Nasa unveils quiet supersonic aircraft in effort to revive commercial flights
@CommieCretzl@hexbear.net avatar

1.4 times the speed of sound – or 925mph (1,488 km/h)

I feel like I’m going mad

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