Galaxies would not have formed.
Galaxies tend to come in what we call clusters.
galaxies , it's like an atmosphere surrounding them.
Galaxies like these, and our galaxy is one of these, you don't see this relationship so it's very interesting.
galaxies .
galaxies this is the Hubble Deep Field of galaxies this is a picture of the univers that you would get by taking a
galaxies you can sort of see that on the left hand side of this picture there's clearly a cluster of galaxies there in
galaxies that are bound by their Mutual gravitational attraction most of the ordinary matter most of the hydrogen and
galaxies are small Etc but Supernova are special there's a certain kind of
galaxies in this shimmering Island
galaxies work, how many galaxies there are, how do we observe them, how do they change over time.
galaxies and working backwards to figure out that actually the universe is getting bigger now at a faster rate than it was in the past.
and galaxies that it was imaging at the time.
And galaxies are star crowds.
if galaxies are moving away from each other today, this means that they were together in the past-- or they were closer by in the past.
Here galaxies in the sky.
become galaxies such as the Milky Way.
of galaxies out there.
These galaxies contain a finite number of stars, maybe about 10 to the 22 stars, over 10 sextillion.
other galaxies but it's expanding so what does that mean what it means operationally for Hubble Is that he figured out how far away the galaxies
the galaxies but that doesn't mean that what you see is what there is maybe there's parts of the universe that you
that galaxies are moving at Great distances away from us um how their velocity depends on how far away they
of galaxies in the Coma Cluster and he was looking at the speed at which these galaxies were moving around in the cluster and those speeds are indicative of
into galaxies or stars; and only .4 percent stars and planets and us.
And even these galaxies , these much bigger structures, are again part of even larger structures.
And many of the galaxies here in the Hubble Ultra-Deep Field, we see them billions of years ago, even 12 billion years ago, or more.
We see smaller galaxies , little baby galaxies .
It uses data on galaxies .
interesting stars and galaxies .
Light from distant galaxies takes millions or even billions of years.
They are galaxies , too.
Each one of these galaxies has these billions of stars.
And between galaxies here, it's one bean unit, one and a half, two bean units.
There are 505,000 galaxies inside that eye of the needle.
Do these other galaxies not like us?
The universe has galaxies in it.
So arbitrary clusters of galaxies were separated by half of their value, of their present value.
Suppose we look at galaxies at redshift 1.
And two clusters of galaxies have whatever separation they have right now.
Measure the distances of galaxies having a wide range of redshifts and see which of these curves the universe has been following.
to give rise to galaxies , and stars, and chemistry, and life.
And we do see galaxies colliding, by the way, and they just have the regular sort of gastrophysics that you'd expect.
In these places the galaxies are typically surrounded by very hot gas, gas between the
numbers of galaxies , are clearly intimately tied to the evolution of galaxies and super massive black holes.
Most Green Valley galaxies that we see out in the universe have black holes that are much more active in their center.
100 billion galaxies in the universe if you've heard the phrase the internets this is what is being referred to with
clusters of galaxies but unlike a typical cluster the shape of this gas is a little weird you would expect to see
through each other the galaxies are actually kind of tiny the Galaxy just went right through without even interacting very much but the hot gas in
between the galaxies smacked into the hot gas of the other cluster that's why you have this shock wave on the right
pink not as the galaxies so you can do that you can look for where the matter is by looking at the galaxies behind the