astronomy

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Zachariah, w The New, Farthest Galaxy has Been Found by Webb. Only 280 Million Years After the Big Bang
@Zachariah@lemmy.world avatar

The JWST has done it again. The powerful space telescope has already revealed the presence of bright galaxies only several hundred million years after the Big Bang. Now, it’s sensed light from a galaxy only 280 million years after the Big Bang, the most distant galaxy ever detected.

Prior to the JWST, we had no infrared telescopes with large enough mirrors to detect light from the early galaxies. The Hubble can see near-infrared light, but only has a 2.4-meter mirror. It found only one galaxy from the Universe’s 500 million years. The Spitzer Space Telescope was a dedicated infrared telescope, but it only had an 85 cm mirror. Not only does the JWST have a much larger mirror, but detector technology has advanced so much that the veil obscuring the early Universe is being lifted one ancient galaxy at a time.

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

How do Sedna and that new one have a stable orbit? Are they that fast, to be able to compensate the movement of Pluto?

edgemaster72, (edited ) w New dwarf planet spotted at the edge of the solar system
@edgemaster72@lemmy.world avatar

Obviously there’s a Planet X out there, where else would Chemical X come from

https://comicvine.gamespot.com/a/uploads/scale_medium/11/111746/3010576-4549542249-Chemic.jpeg

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

So, draft planet 8.1 ? 8.3 because of Pluto and Charron?

collapse_already,

Don’t forget Eris. Weighs more than Pluto.

MadMadBunny,

Oh shit yeah… So, 8.4 then?

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

They prefer to be called little planets, tyvm.

Assian_Candor, w New dwarf planet spotted at the edge of the solar system
@Assian_Candor@hexbear.net avatar

Pluto defenders in shambles

But I am not sure how to process this as a planet X fan

TankieTanuki,

planet X

my-hero 🪐

Edit: Also, Pluto would totally whoop Planet X’s ass one-to-one!

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

When we hit the floor you just watch them move aside
We will take them for a ride of rides
They all love your miniature ways
You know what they say about small boys

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

dibs

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

“The object is currently about 90.5 astronomical units (AU) away from us, or roughly 90 times as far from Earth as the sun is.”

This sentence pissed me off so much and I stopped reading after it.

It is 90.5 times as far from the Sun as the Earth is from the Sun. Why’d you have to go and change the frame of reference to Earth?

AlbinoPython,

I mean, they said “roughly”.

corsicanguppy,

Like, give or take one AU, throughout the year.

tiny_hedgehog,

Fair, but annoying to the pendantic.

powerofm,

“It’s 20.5°C outside or roughly 20 notches on your thermometer (except for americans)”

ThermonuclearEgg,
@ThermonuclearEgg@hexbear.net avatar

Here’s another article that doesn’t do this for anyone else that would prefer it:

phys.org/…/2025-05-extreme-cousin-pluto-dwarf-pla…

Etterra,

Well it’s a good frame of reference because it’s where most of us keep all our stuff.

Zos_Kia,
@Zos_Kia@lemmynsfw.com avatar

Talk about putting all our eggs in the same basket smh

Kichae,

It didn’t. It’s 90.5 AU from us, and us is Earth. Or do you live on the Sun?

tiny_hedgehog,

If we are 1AU from the sun, and this planet is 90AU from the sun, then it is between 89 and 91 AUs from earth depending on the progress of our orbits (assuming perfectly circular orbits). So they did change the frame of reference.

lud,

This dwarf planet is 90 AU from US not from the sun. They just said that the dwarf planet is 90 AU away from us and that 1 AU is equal to the distance between the sun and the earth.

But since the dwarf planets orbit is extremely eccentric that varies heavily.

tiny_hedgehog,

You are right. I stand corrected.

remotelove,
@remotelove@lemmy.ca avatar

They didn’t change the reference, they defined an AU.

bjoern_tantau, w New dwarf planet spotted at the edge of the solar system
@bjoern_tantau@swg-empire.de avatar

Ugh, didn’t read the “dwarf” part and got my hopes up for planet 9. When they eventually do find it they have to name it something with P so that the old mnemonics still work.

Zachariah,
@Zachariah@lemmy.world avatar

“Planet 9” starts with “P”

FaceDeer,

I've heard that the sign of a fair bargain is that everybody leaves unhappy. So how about we name it "Pluto?" That should annoy pretty much everyone.

SuperEars,

“Plutwo”

Microw,

This study authors btw say that their models for 2017 OF201’s orbit work best without the influence of a hypothetical planet 9

bjoern_tantau,
@bjoern_tantau@swg-empire.de avatar

Ooh, nice!

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

This far-flung orbit may be the result of an encounter with a giant planet, which ejected the candidate dwarf planet out of the solar system, say the researchers.

Poor guy. Hopefully he’s out there finding his own family.

At least it doesn’t have to deal with the toxicity Pluto does, being in the family one day and then coldly rejected from the family from the planet club the next. And we wonder why it’s exterior is frozen…

Rhaedas,
@Rhaedas@fedia.io avatar

Dwarf or not, Pluto is STILL a planet.

FaceDeer,

It's not, actually. "Planet" and "Dwarf planet" are disjoint sets, according to the IAU.

Is a sea lion still a lion? Same thing.

WoodScientist,

Well, screw the IAU. What the hell does “clearing your neighborhood” even mean?

FaceDeer,

This article goes into great detail about the various methods that one can use to measure or calculate the orbit-clearing capability of an orbiting body.

It turns out that for all of these different methods, you will find an extremely clear bimodal distribution that groups the 8 planets together as being highly capable of clearing their orbits whereas everything else falls into a statistically distinct non-clearing group. This is because there's sound dynamic reasons for why objects would fall into one group or the other with nothing lasting long in the "grey area" between them. Once an object becomes significantly better than its orbital neighbors at clearing the neighborhood it snowballs due to the feedback loop of scattering or absorbing its neighbors into itself.

That makes this a good criterion for classification. As the old saying goes, "cleave nature at the joints."

MadMadBunny,

There are so many nasty potential jokes I decided not to get involved. Fuck it I ain’t touching that with a 30-foot pole.

Swedneck,
@Swedneck@discuss.tchncs.de avatar

it means that either pluto isn’t a planet, or basically the entire fucking asteroid belt it’s part of is all planets

LanguageIsCool,

It’s also not a sea

atomicbocks,
dream_weasel,

Jerry?

luciole, w “Ursa Major” sounds like a Jamaican DJ…
@luciole@beehaw.org avatar

cool nickname for an ursaring too

PalimpsestNavigator,

Sadly, I had to look that up. Ah, Pokémon… the gulf separating me from my generation.

lvxferre, w “Ursa Major” sounds like a Jamaican DJ…

Proposal to change Ursa Major and Ursa Minor to Chonky Bear and Smol Bear.

PalimpsestNavigator,

Incredible. Granted

anguo, w "Big surprise": astronomers find planet in perpendicular orbit around pair of stars

Isn’t that literally the premise of the Three Body Problem?

teft,
@teft@lemmy.world avatar

The 3 body problem has no general solution. This would be a special case solution.

anguo,

Ah, yes, I just read the title again!

Bldck,

Not exactly. In the novel/tv show the Three Bodies are stars that are interacting with a fourth object, the planet Trisolaris.

Because the movements of the three suns are unpredictable, they never know when the climate of the planet will be habitable.

anguo,

Yes, I remember now that I thought “that’s a four body problem” when I read it.

MNByChoice, w "Big surprise": astronomers find planet in perpendicular orbit around pair of stars

Cool. Space is really cool. Keep up the good work Astronomers. Love the cool things you find.

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