astronomy

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Shurimal, w What would happen if you moved at the speed of light?

If you somehow got rid of your rest mass to move at the speed of causality, two things would happen: first, you'd experience no time; second, you'd instantly crash into your destination and die in a rather energetic way. That's the neat thing about photons; from a photon's POV time and distance do not exist. A photon, from its POV, is emitted and absorbed at the same time in the same place.

Much more interesting is having rest mass and moving at a high fraction of c: http://gamelab.mit.edu/games/a-slower-speed-of-light/

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

The Radiolab episode was quite good, definitely recommend a listen

sramder, w First Space Force guardian to be launched into space this summer
@sramder@lemmy.world avatar

“Guardians” I don’t know how to feel about that.

gravitas_deficiency,

Yeah the Space force was created during the Trump administration…

sramder,
@sramder@lemmy.world avatar

It’s more that it evokes two completely conflicting ideas. The optimistic idealism of my youth or the bitter cynicism of Verhovens Starship Troopers.

Pretty sure Trump just gave himself credit for it.

LesserAbe,

Yeah we would scoff at someone calling a soldier “guardian” even if they’re fighting for us, so let’s scoff at calling space soldiers “guardian” too.

sramder,
@sramder@lemmy.world avatar

Yeah, the attempts to distance themselves from the military aspect of it is not really engendering a lot of trust… “He’s going up to do *s c i e n c e,*low gravity research or something, various experiments, don’t worry about it.“

maegul, w NASA's Webb Depicts Staggering Structure in 19 Nearby Spiral Galaxies
@maegul@lemmy.ml avatar

It’s wonderful to see how even at this scale there’s still that fractal-ish, dense and chaotic, but elegant and beautiful aesthetic that nature creates.

nothacking, w The amazing helicopter on Mars, Ingenuity, will fly no more

Well, it lasted longer then any of my drones do before I have to replace a propellor. (That might be a bit harder on Mars)

MrJameGumb, w The Cosmic Bat Nebula
@MrJameGumb@lemmy.world avatar
CADmonkey, w NASA Finally Removes Last Two Fasteners To Access Historic Bennu Asteroid Sample

Getting a stripped screw or bolt to come out is one thing.

Getting one out without contaminating everything around it is another.

Uninformed_Tyler, w NASA Finally Removes Last Two Fasteners To Access Historic Bennu Asteroid Sample

Breaking News you say

brettvitaz,

I think they removed the fasteners without breaking anything.

JadenSmith, w New dwarf planet spotted at the edge of the solar system

They prefer to be called little planets, tyvm.

LostXOR, w Webb telescope just snapped direct image of worlds many light-years away

That's really awesome! I'm impressed that JWST's coronagraph was able to block out the star's light so completely.

MrFappy, w X-ray Signal Points to Destroyed Planet, Chandra Finds

What if the planet used to have intelligent life but they blew themselves up accidentally.

Enkers,

It would be interesting if the answer to the Fermi paradox was that every advanced lifeform accidentally blows themselves up.

chowdertailz,

That’s the Great Filter. Basically, no intelligent life can survive past a certain point because they end up offing themselves. Pretty much what we’re about to do ourselves.

LordTrychon,

It doesn’t HAVE to be that intelligent life is its own doom, but it does seem increasingly likely.

Enkers,

There are other explanations, ofc. Maybe there’s a galactic moratorium on contacting new space faring civilisations.

If you’re willing to discard the conclusion that we’re an early civilisation, then it’s reasonable to think that old civilisations have had plenty of time to decide whether or not to contact us.

There are quite a few different takeaways you could draw from that. My personal favourite is that they want to recreate the “early universe” experience for us because it’s an important process for civilisations to go through.

onlinepersona, w In a last-minute decision, White House decides not to terminate NASA employees

I do my best to block any news regarding the new administration, so this comes at quite a surprise that it was even considered. Always thought NASA was one of the great prides of the country, but it seems like those days are long gone.

Anti Commercial-AI license

ruk_n_rul,

NASA peaked during the Apollo project, after which budget plummeted and never reach the 1% mark on the national budget again

clay_pidgin,

In the mass firing they lake of the people who maintain nuclear weapons and the people working on bird flu. Once they realized they need those people they started trying to rehire them.

casmael, w Don’t panic, but an asteroid has a 1.9% chance of hitting Earth in 2032

Okay so how big is this meteor then

everett,

Exactly one meteor wide. Do you need the height as well?

dellish,

Is it meteoric?

everett,

The meteorest.

Norgoroth,
@Norgoroth@lemmy.world avatar

130 - 400 meters

GooberEar,

It’s around 1000 millimeteors

threelonmusketeers,

Listed in the article:

Scientists estimate that 2024 YR4 is between 130 to 300 feet (40 and 90 meters) wide

spongeborgcubepants,

How many giraffes is it tho

threelonmusketeers,
Comment105,

Fuck, I was hoping for a 10-15 km wide one.

psud,

Were it to hit it would hit like a large nuke

homesweethomeMrL, w JWST facing potential cuts to its operational budget

Well now that the idiots of all stripes have put us in this exciting new world, let’s see what the optoins are:

  • Change nothing, and get cut
  • Put advertising in space and get cut
  • Ask oligarchs for money to make AI use JWST real good (but don’t of course)

Or the most obvious and pathetically realistic option: rename it for trump and watch it’s funding remain the same or even get a little tiny bump.

SanctimoniousApe, w Astronomers just deleted an asteroid because it turned out to be Elon Musk’s Tesla Roadster

There oughtta be a sci-fi short story competition using this for a basis - what happens when aliens eventually come across this bizarre piece of junk in space?

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