astronomy

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CodexArcanum, w "Cannibal" star left with metal scar after swallowing its planet

C A N N I B A L

S T A R

M E T A L P L A N E T

S C A R S

sick as frick guitar solo

umbrella, w 3 tiny new moons found around Uranus and Neptune — and one is exceptionally tiny
@umbrella@lemmy.ml avatar

at one point we have to realize theres an infinite number of small rocks orbiting any given planet

maniacalmanicmania,
@maniacalmanicmania@aussie.zone avatar

Why you gotta be so mean to my itty bitty moon brothers and sisters?

Spaghetti_Hitchens,

The itty bitty satellite committee

elmicha,

Does Earth also have such small orbiting rocks that are a few kilometers wide?

Bumblefumble,

No, we only have one moon. I think the gravity of the moon is too large for other moons to be in a stable orbit around Earth.

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

It’s impressive how much detail Juno was able to capture even on the night side. What I love about Io is how it’s instantly recognizable. Nothing even remotely resembles it in the solar system.

p03locke, w Discovery Alert: A 'Super-Earth' in the Habitable Zone - NASA Science
@p03locke@lemmy.dbzer0.com avatar
downpunxx, w Map reveals all the space junk we've already littered on Mars
@downpunxx@kbin.social avatar

you say junk, but someday soon that shits gonna save mark watney's life

derphurr, w Discovery of second ultra-large structure in distant space further challenges our understanding of the universe

It’s not a “new” discovery or even the “second”. I suggest they read the 2015 paper they are almost copying from.

2015 dx.doi.org/10.1093/mnras/stv1421

Evidence suggests that this feature is the projection of a shell on to the plane of the sky. Voids and string-like formations are common outcomes of large-scale structure. However, these structures have maximum sizes of 150 Mpc, which are an order of magnitude smaller than the observed GRB ring diameter. Evidence in support of the shell interpretation requires that temporal information of the transient GRBs be included in the analysis. This ring-shaped feature is large enough to contradict the CP. The physical mechanism responsible for causing it is unknown.

Weird reporting like this is “new” GRB ring out of Swift and Sloan SDSS data.

Sloan Great Wall, which is around 1.5 billion light-years in length

South Pole Wall, which stretches 1.4 billion light-years across.

Hercules-Corona Borealis Great Wall, which is about 10 billion light-years wide

2015 en.m.wikipedia.org/wiki/Giant_GRB_Ring

It is approximately 9.1 billion light years from Earth and about 5.6 billion light years across

New objects:

Big Ring in the Sky is 9.2 billion light-years from Earth. It has a diameter of about 1.3 billion light-years

Giant Arc in the Sky which is 3.3 billion light-years across,

thefluffiest, w Nasa unveils quiet supersonic aircraft in effort to revive commercial flights

And exactly how much CO2 emissions does this thing generate?

joostjakob,

It makes me so mad we don’t just tell the flight industry that by date X no planes that use traditional fuel can be produced, and by date Y that they won’t be allowed to fly. Doesn’t even need to a global agreement, if the European market is closed, than that could be motivation enough. And it would focus innovation on efficiency instead of frivolous stiff like this.

happybadger, w NASA Selects a Wild Plan to "Swarm" Proxima Centauri With Thousands of Tiny Probes
@happybadger@hexbear.net avatar

As Universe Today explored in a previous post, it would take between 19,000 and 81,000 years for a spacecraft to reach Proxima Centauri using conventional propulsion (or those that are feasible using current technology)

Jesus, at 4.25 light-years.

GlitchyDigiBun,
@GlitchyDigiBun@lemmy.dbzer0.com avatar

Acceleration is a bitch. A manned flight would take longer as it would have to cap it’s thrust to 1-1.5G or risk long term effects. Not to mention having to cancel ALLL of that thrust starting at the halfway point.

happybadger,
@happybadger@hexbear.net avatar

Biology is frustrating. We’re built for everything except leaving the immediate area around the sea we crawled out of. Anything beyond that and our bones melt into cancer.

Flyberius,
@Flyberius@hexbear.net avatar

If you could maintain 1g of acceleration you would reach light speed in about a year.

Contentedness, w Toxic Mars Dust Could Pose Major Health Risks For Future Astronauts

I don’t want to sound flippant, but I feel like that’s pretty far down the ol’ crisis ladder right now.

veroxii,

It might be our only way out. Send Musk and the Magats there. Toxic sand can only help.

Frozengyro,

Have you been exposed to Mars dust!?!? You may be entitled to compensation!

p03locke,
@p03locke@lemmy.dbzer0.com avatar

If we were realistic about going to Mars, we’d start with serious plans to build an oceanic base on Earth first. Traveling to Mars is a small hurdle, in comparison to actually living there. We’d learn a lot if we built a self-sustaining base in the deep ocean.

stelelor, w Astronomers seek global ban on space advertising

Jesus fuck, Wall-E was supposed to be a dystopia, not an inspiration.

rockSlayer, w The IAC confirms the existence of a Super-earth in the habitable zone of a Sun-like Star

That orbit is better described as passing through the habitable zone. How this would affect potential life, I have no clue, but it certainly isn’t a stable orbit in the habitable zone like earth or mars

knightly,
@knightly@pawb.social avatar

Another article said it had 6.6 times earth’s mass, and now I’m really curious about the diameter and atmospheric composition. It sounds like it’d be a big Venus that alternates between freezing and boiling.

rockSlayer,

It sounds like an extremely interesting planet for sure, I hope they point Webb at it to get an atmospheric spectral analysis soon!

LuxSpark, w Supermassive black hole spotted 12.9 billion light-years from Earth — and it's shooting a beam of energy right at us

Black hole sun: won’t you come?

Nuke_the_whales, w Tiny glass beads suggest the moon had active volcanoes when dinosaurs roamed Earth

I didn’t realize the moon was ever anything but just a dead rock floating there

Beacon, (edited )

The leading hypothesis is that the moon was formed when a massive asteroid smashed into the earth and blasted a huge chunk of the earth into space, and that became the moon. If true then the moon's birth and younger existence was wildly cataclysmic

https://en.m.wikipedia.org/wiki/Origin_of_the_Moon

threelonmusketeers,

a massive asteroid smashed into the earth

Asteroid, or proto-planet?

Beacon,

Wiki refers to it as a "mars-sized body"

MelodiousFunk,
HurlingDurling,
@HurlingDurling@lemmy.world avatar

So… the planet or candy bar?

Yes it’s a joke, however if a mars candybar hits earth at 99.999999% of the speed of light, I’d imagine the impact would be anything but a blip

neurospice, w Voyager 1 is fully back online months after it stopped making sense.

Incredible! Can’t believe how long it’s been functioning for and how many obstacles it’s overcome. Truly a testament of human engineering

Daxtron2, w Event Horizon Telescope reveals magnetic fields around the Milky Way’s central black hole - NASASpaceFlight.com

I can’t get over how fucking cool these pictures are and how they keep getting better and better.

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