what is beyond our galaxy, other galaxy? how do we know?

Question

what proof is there that other galaxies exist beyond other galaxies? how do we come to that conclusion?

Answer 1

hubble, chandra & others. that's how we know! for what is beyond, would you like to see? there is an image, called Hubble Ultra Deep Field, that everyone on earth should see. it is a photograph of about 10,000 galaxies - in a slice of sky the size 1/8th of the full moon from earth, about. see it, and feel small

Answer 2

There are countless billions of other galaxies beyond our own, almost all of which are receding from us.

The evidence is seen through the Hubble Space Telescope, amongst other things. The evidence is that you can actually see these things! Measure their size, recession, composition, angular momentum, etc.

BTW, if you look at Space.com or a similar website, you will be blown away by the beauty and mystery of what is out there. You don't just see through space, but also through time - sometimes billions of years ago.

If you want to come across things that are REALLY weird, read about bubble-walls and super-clusters. Wow, it stretches the imagination.

Answer 3

A lot of empty space and millions of other galaxies. The proof is in our eyes: every clear night I look at many different galaxies all over the sky with my telescopes. These have been photographed thousands of times, and studied with spectroscopes and other instruments. Get real!

Answer 4

Galileo was one of the first to train a telescope toward the night sky. He viewed face-on and edge-on galaxies, including planets and moons. Since then, we've recorded distances through the differences in wavelengths. One way, is to record the estimated mass of the star, thereby giving you an indication of its composition. From the composition, one can look up the spectrum of light patterns on a spectroscopy chart. The difference in expected values minus actual values is the rate of change in movement. We then know how far away and how fast it's traveling.

Answer 5

Hello.

Our Galaxy consists of 200 Billion + stars and is formed into a disk like shape 1500 Light Years wide and 1.5 light Years thick. It has multiple spiral arms inside of it made up of groupings of stars with a dense mass of stars right in the very center or hub of the spiral.

Beyond our Galaxy are thousands and thousands of other galaxies. Each one of them has millions and millions of stars inside of it. How do we know? We can see them with our optical telescopes on Earth and from space based telescopes which we operate remotely from the Earth's surface. The Andromeda Galaxy, for example, is some 4 1/2 Light years away from out Milky Way Galaxy. Others are thousands up to millions and billions of light years away.

If you wish to learn more about them you might want to look at a book by Ian Ridpath, ASTRONOMY, Published by DK Publishing, NY NY. He shows lots of information on the closest galaxies and their names.

Answer 6

Other galaxies can be faintly seen with the naked eye. They appear as fuzzy objects in the sky that seem to disappear when you try to focus on them. People mention the Hubble telescope since it has brought about the discovery of thousands of galaxies never seen before but telescopes have been able to see other galaxies since the French astronomer Charles Messier began cataloging them in the 1750's.

this is a very cool site-

http://www.spiral-galaxies.com/constellation.html

more pictures of spiral galaxies-

http://astrojan.fw.hu/

and more-

http://www.biochem.szote.u-szeged.hu/astrojan/ngc4.htm

Answer 7

Visit galaxyzoo.org. The evidence is that they can be seen. When you can see something there is a fair old chance that it is actually there.

Answer 8

Photographs have been taken of them, they have been proved mathamaticaly.
Are you a flat earther?

Answer 9

when we know our glaxy there is nothing wrong in assuming that there can be other glaxies also. as universe is endless, it is not humanly possible to discover it in entirety.