phys.org

deegeese, do astronomy w Webb directly images two planets orbiting white dwarfs
remotelove, do astronomy w Doomed US lunar lander now headed for Earth: company
remotelove, do astronomy 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.

pom, do astronomy w Japan's precision moon lander has hit its target, but it appears to be upside-down

Or is it just showboating

GombeenSysadmin, do astronomy w Japan's precision moon lander has hit its target, but it appears to be upside-down

Did they launch from Woomera or something?

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

That earth doesn’t look flat.

FaceDeer, do astronomy w Japan's precision moon lander has hit its target, but it appears to be upside-down
@FaceDeer@kbin.social avatar
EtherWhack, do astronomy w Japan's precision moon lander has hit its target, but it appears to be upside-down
@EtherWhack@lemmy.world avatar

Looks like they forgot the C.A.T. module

Dubiousx99, do astronomy w Japan's precision moon lander has hit its target, but it appears to be upside-down

Looks like someone missed a negative sign in the equation to account for the reverse gravity direction. /s

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

Jian Yang!!

gravitas_deficiency, do astronomy w Japan's precision moon lander has hit its target, but it appears to be upside-down
Brunbrun6766, do astronomy w Discovery of second ultra-large structure in distant space further challenges our understanding of the universe
@Brunbrun6766@lemmy.world avatar

Doubt, something unknown? Sure. Structure? Doubt.

FishLake,

“Structure” in this case means “big glob of galaxies slightly closer together than other globs”

halcyoncmdr,
@halcyoncmdr@lemmy.world avatar

In astronomical terms structure doesn’t mean a building of any kind.

universe.nasa.gov/…/large-scale-structures/

derphurr, do astronomy 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,

plinky, do astronomy w Discovery of second ultra-large structure in distant space further challenges our understanding of the universe
@plinky@hexbear.net avatar

oh damn, maybe they’ll fuck up inflation again 🥳

Jeredin, do astronomy w Lightest black hole or heaviest neutron star? MeerKAT uncovers a mysterious object in Milky Way

I’ve been studying the range of neutron stars for some time and I feel confident it won’t be too long until much of our evidence and observations will show that black holes, quasars, super massive black holes and the range of other black holes are very likely, more extreme neutron stars - if not quark-like stars or stellar quantum-like objects. For fun, I’ve been also been focusing on colloids, extreme condensates and their quantum/relativistic phases/states; very revealing interactions and emergent properties. Now if we could just better observe zero-point energy…

5714,

What is zero-point energy?

Jeredin,
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