space.com

_NetNomad, do astronomy w 3 tiny new moons found around Uranus and Neptune — and one is exceptionally tiny
@_NetNomad@kbin.run avatar

i wonder if something that size would even have noticable gravity

muhyb, do astronomy w For this dead star, 72 years is a single Earth day

Godzilla had a stroke trying to read that title.

kat_angstrom, do astronomy 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)

shortwavesurfer, do astronomy w Laser on NASA's Psyche asteroid probe beams data from 140 million miles away

Okay, that’s really cool and 25 megabits per second is actually very good compared to what they get back from other probes. At speeds like that, they could send back 4k pictures, which would be extremely high resolution for craft like this.

LostXOR, do astronomy w Solar eclipse on Mars! Perseverance rover sees Martian moon Phobos cross the sun in epic video

I remember another video of this from a while back, really cool!

c10l, do astronomy w Total solar eclipse 2024: Live updates

will be visible across the Americas

Proceeds to list 3 regions in North America where it will be visible.

runswithjedi, do astronomy w Laser on NASA's Psyche asteroid probe beams data from 140 million miles away

deleted_by_author

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  • ChicoSuave,

    I think you answered your own question.

    Rubisco, do astronomy w Big, doomed satellite seen from space as it tumbles towards a fiery reentry on Feb. 21 (photos)

    In an update posted on Sunday (Feb. 18), ESA said that the rentry ERS-2 is expected to take place on Wednesday (Feb. 21) at 10:19 a.m. ET (1519 GMT), plus or minus around 19 hours. This uncertainty is due to the “influence of unpredictable solar activity, which affects the density of Earth’s atmosphere” and can therefore change how much drag pulls on the satellite on its way down, ESA wrote.

    Plus or minus 19hrs due to the sun’s effect on the density of the atmosphere. Mind blown.

    threelonmusketeers, do astronomy w Water found on the surface of an asteroid for the 1st time ever

    Ah, SOFIA. I miss her.

    kalkulat, do astronomy w What would happen if you moved at the speed of light?
    @kalkulat@lemmy.world avatar

    ‘Speed of light’ compared to what? is what you need to worry about. Most things in the universe won’t be moving at the speed of light compared to you (or whatever you’re inside of), and when you run into them, you won’t last for long.

    Kata1yst,
    @Kata1yst@kbin.social avatar

    That's the neat part of the speed of light. It's the speed of light for every reference frame, no matter who is looking at you or from where.

    kalkulat,
    @kalkulat@lemmy.world avatar

    If you’re zooming past the Earth at the speed of light headed straight at the Moon, you’ve got about 1 second to enjoy that before you make a very, VERY large crater.

    If you change course and head straight at a frozen tardigrade, it will make a VERY large crater in you.

    Kata1yst,
    @Kata1yst@kbin.social avatar

    To actually reach the speed of light you'd be massless, so the only damage, would be from momentum transfer, at which point your particles would be reflected or absorbed like light.

    But that aside, mostly I was referring to your statement:

    'Speed of Light' compared to what?

    Which is really not a concern. It's the speed of light for everyone with respect to everything, or it isn't the speed of light. Like, two beams of light going in opposite directions don't see the other light beam going at 2x the speed of light, just at the speed of light with lots of time dialation.

    kalkulat,
    @kalkulat@lemmy.world avatar

    You already knew the answer to ‘What would happen if you moved at the speed of light’ was was “To actually reach the speed of light you’d be massless.” No shit. The question was already massless.

    threelonmusketeers, do astronomy w Nuclear power on the moon: NASA wraps up 1st phase of ambitious reactor project

    Seems better suited for !space or !NASA. Cool project though.

    cyberpunk007, do astronomy w ISS astronaut controls Bert the dog-like robot on Earth during simulated Mars mission

    They say he can explore small caves, but wouldn’t this little guy be solar charged and they could lose him if he doesn’t have enough juice to get back to the surface?

    crazyminner, do astronomy w ISS astronaut controls Bert the dog-like robot on Earth during simulated Mars mission

    What the hell is the blue thing going on in the background. That thing looks way cooler.

    jadero, do astronomy w Total solar eclipse 2024: Live updates

    I’m more interested in the magical appearance of four states in “southeast” Canada than yet another solar eclipse.

    Did someone forget to vet the AI’s output?

    HootinNHollerin, (edited ) do astronomy w Chinese space junk falls to Earth over Southern California, creating spectacular fireball (photos, video)

    Oh damn wish I knew and could’ve watched it. Also a bit unnerving

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