Starship Asterisk*

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So here is M94, in the middle* of the road to Virgo cluster and M87, and here is M101, jumping a little up to Local Void from where the 3d app is looking: Closer Than Virgo.jpg Closer Than Virgo 2.jpg https://asterisk.apod.com/download/file.php?id=47662&mode=view in fact it is M96/Leo in the mid...

http://www.galaxies3d.org/section-download.htm
I am thick but finally got it, there is a 3d space map freeware
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Galaxy Groups Closer Than the Virgo Cluster (720p_25fps_H264-192kbit_AAC).mp4_snapshot_00.58_[2023.06.12_14.53.15].jpg Galaxy Groups Closer Than the Virgo Cluster (720p_25fps_H264-192kbit_AAC).mp4_snapshot_00.56_[2023.06.12_15.14.15].jpg https://asterisk.apod.com/download/file.php?id=47642 And here...

where is M94? where is M101? Pretty close. M94 is in fact in the Council of Giants gathered around Milky Way and Andromeda while M101 is right next to the CoG. I finally found something like a 3d map . Sadly it's only a video, not an online interactive 3d model, but you can slide the slider and find...

To my eye this APOD looks like black dust clouds with hydrogen auras backlighted by a point source, probably the bright star 11 o'clock from the centre of the APOD Some dusty arms, mostly spread out perpendicular to the illumination from that point source, are so thin that we can see only their hydr...

I wonder what the field of view is for background galaxy distribution and would-be filaments and clusters It must be smaller than 6 million ly because for large redshifts the more the distance (comoving radial distance) the more the angular size of the observed object. For a given angular size of th...

""At the Pandora Cluster's estimated distance this cosmic box spans about 6 million light-years." This can't be correct. Maybe 60 million? 6 million sounds reasonable. At a distance of 4 billion ly and a span of 6 million ly, that corresponds to a subtended angle of 5 arcmin. The NIR...

Why does the text describe the outer ring as "not closed"? It looks pretty closed to me in this image. Unless they're talking about the apparent bridge of stars/gas at 3 o'clock between it and the inner, more colorful area? [ And honestly, I really see only ONE ring here, the outer one, p...

IR+UV don't see rings at all

So the outer doughnut is a treat that is hard to bring out.
Does this shape mimic a stellar system's Koiper's belt?
Does this shape reflect a thickening in dark matter halo?
Why is at angle to inner disk?

Why does the text describe the outer ring as "not closed"? It looks pretty closed to me in this image. Unless they're talking about the apparent bridge of stars/gas at 3 o'clock between it and the inner, more colorful area? [ And honestly, I really see only ONE ring here, the outer one, p...

by the way, wiki's label
"Centaurus A/M86 Group 11.9 Mly"
must be wrong…

my bad, wiki label read M83

Corrected my mistake in images on my previous comment. How do I delete this outdated comment now?

Tried and failed to place this galaxy between the Local Sheet and Virgo Cluster. https://upload.wikimedia.org/wikipedia/commons/thumb/5/5b/LocalSheet.jpg/800px-LocalSheet.jpg Wiki does show all the 3 object in one map, here is my clip: 07-Laniakea_(LofE07240)-.jpg 07-Laniakea_(LofE07240)-3.jpg https...

charon_then_now_1024.jpg How many people would have noticed That that bulge by Pluto was a moon? 8-) Wonderful Charon! There was one photo (I couldn't copy) that showed lines in the ice! My opinion; but i Thought that they looked like roads! :evil: https://upload.wikimedia.org/wikipedia/commons/b/b...

A sparse and empty surroundings may be good for a galaxy that wants to do things its own way. Like UGC 1382. https://www.nasa.gov/sites/default/files/styles/full_width/public/thumbnails/image/pia20695.jpg?itok=F6hCo2iV UGC 1382, living its life in splendid isolation unbothered by any big galactic b...

A sparse and empty surroundings may be good for a galaxy that wants to do things its own way. Like UGC 1382. https://www.nasa.gov/sites/default/files/styles/full_width/public/thumbnails/image/pia20695.jpg?itok=F6hCo2iV UGC 1382, living its life in splendid isolation unbothered by any big galactic b...

The simulation seems to show that the Universe likes to make spiral galaxies. So where do all the ellipticals come from? … And one mechanism that destroys spiral galaxies and turns them into ellipticals in large galaxy clusters is the violent outbursts of ultramassive black holes in the largest ell...

What a sparse explanation to this most involved and involving video! Ok, it starts at "Redshift 12", which is how long ago? And ends at "Redshift 0", but no scale or mete is shown. But several do appear with no explanation; "LogM* which increases, "SFR" in "M...

So, about those multiverses Ann mentioned. I have not read all of Tegmark's stuff, but I'm imagining the (or a) Level I multiverse in his hierarchy as a ridiculously large region of "normal" space-time (that is, exactly like the one we exist in) containing an infinite number of smaller re...

It is a problem to show (anti)crepuscular rays in the same pic as the main lamp.
For a sunset scene we can use varying exposure, sort of HDR

Beautiful picture :ssmile: but why is there a rift on it's halo? Maybe that part is blocked by something and doesn't get the energy it needs to be ionized, or maybe there is nothing to be ionized and glow at all? https://i.pinimg.com/736x/62/cb/df/62cbdfb454824e4b323d37534d01dd96--santa-clarita-cal...

orin stepanek wrote: ↑Mon May 29, 2023 8:10 pm SeaBlueSky_Horalek_960_annotated.jpg
I'll never get a screen background; from this;
but it sure is beautiful!

I wonder if there is a place on Earth where the Plankton Way would be annotated with two different oceans to the left and to the right.
Near Cape of Good Hope?

beryllium732 wrote: ↑Mon May 29, 2023 7:09 pm Beautiful image but you really see the galaxy disc and it's dust and H II regions so clearly?

but it was snapshots with exposures 15-25s, getting what human eye (exposure=0.1 s) can't see

My point is that they aren't "filaments" unless there's something binding them together. There is in the case of cosmological structure. There isn't in the case of stars or galaxies inside a cluster. how many years must a filament exist before we call it a filament? I think if a filament ...