Dark Matter? Discovery of 21000 Shadow Galaxies That Were Invisible to Us Befo

[MechAg94]

Discovery of 21000 Shadow Galaxies That Were Invisible to Us Before
https://www.youtube.com/watch?v=lxba4qJ4AJQ

So is this part of what is referred to as "dark matter"? 

I thought this was interesting that there were entire galaxies that we didn't know about (quite a few of them). 

[MechAg94]

https://www.youtube.com/watch?v=gQLBxWO2zx0

In this one, he mentions that we have been discovering a lot more brown dwarf stars recently due to better infrared telescopes. 

[cordex]

I thought this was interesting that there were entire galaxies that we didn't know about (quite a few of them). 

https://en.wikipedia.org/wiki/Hubble_Ultra-Deep_Field
It's amazing how little we know about the universe.

[K Frame]

Great... Shadow galaxies...

Next thing you know, like DC, they'll be demanding full voting status...

Stellar radiation without representation is wrong!


.

[Fly320s]

https://en.wikipedia.org/wiki/Hubble_Ultra-Deep_Field
It's amazing how little we know about the universe.

“Space is big. You just won't believe how vastly, hugely, mind-bogglingly big it is. I mean, you may think it's a long way down the road to the chemist's, but that's just peanuts to space.”

[Jim147]

Shadow galaxies?

I think we need some rangers and Vorlons.

[MechAg94]

“Space is big. You just won't believe how vastly, hugely, mind-bogglingly big it is. I mean, you may think it's a long way down the road to the chemist's, but that's just peanuts to space.”

I have seen people in the past basically say we can see everything from here so that means there aren't any surprises out there.  It was a while back, but I was taken aback by that attitude. 

[K Frame]

It wasn't that long ago -- only about 100 years, IIRC --  that scientists though that everything we see was part of one very large cluster -- that there weren't separate galaxies at all.

[MechAg94]

It wasn't that long ago -- only about 100 years, IIRC --  that scientists though that everything we see was part of one very large cluster -- that there weren't separate galaxies at all.

Well, the people I was thinking of would also argue with you if you suggested evolution as the origin of the species may not be 100% true or even suggest anything they considered anti-science. 

I just try to keep an open mind about everything as there is always more to learn.

[HankB]

“Space is big. You just won't believe how vastly, hugely, mind-bogglingly big it is. I mean, you may think it's a long way down the road to the chemist's, but that's just peanuts to space.”

IIRC, we think the most distant objects we've seen are a bit more than 13 billion light years away. Which means that 13 billion years ago, they were already 13 billion light years away. So . . . if the universe expanded at the speed of light, and 13 billion years ago they were already 13 billion light years away, then the universe must be at least 26 billion years old.

BUT IT'S NOT say the astrophysicists. AHA! INFLATION! Space itself expanded at superluminal velocity, carrying matter with it. This is really not well understood, but trust the astro guys, they know their stuff.

Now . . . ask the astro guys if the universe has a radius of 13 billion light years . . . and the most distant objects we see are pretty much the same distance in all directions - are we the center of the universe?

Crickets . . . 

Bottom line is we really still don't know what we don't know.

[WLJ]

Shadow galaxies?

I think we need some rangers and Vorlons.

The Shadows have much cooler parties + the girls at the Vorlon's keep slapping me before I can even say anything.

[lee n. field]

The Shadows have much cooler parties + the girls at the Vorlon's keep slapping me before I can even say anything.

The goody-two-shoes of the First Ones.  Too straight arrow to be any fun.

[230RN]

" then the universe must be at least 26 billion years old."

Aha !  At last a truly physical and nature-bound SI-friendly unit of time !