No. They come in different sizes and different shapes, and have other differences as well.
All galaxies are massive clusters of stars scattered across the universe. Many galaxies take the same form, for instance, spiral and elliptical galaxies. Some galaxies also have a black hole in their center.
All stars and galaxies are in the universe.
The Universe.
A universe is a very big realm of darkness with galaxies in it. and there are billions of galaxies in the universe! One of those galaxies is our solar system, and in that solar system is our planet. There probably is even more then just one univserse. O_o Well... Galaxies are within the universe and a universe is defintly bigger then a galaxy
the universe is made up of galaxies
The Universe.
Perhaps in the future astronomers will do all the redshifts of the 100 billion galaxies in the universe.
WikiSky will not map all 100 billion galaxies in the observable universe
About 13 billion years old. The Universe itself is approximately 13.75 billion years old. All galaxies are about the same age and Irregular Galaxies were more common when the universe was younger.
All galaxies are massive clusters of stars scattered across the universe. Many galaxies take the same form, for instance, spiral and elliptical galaxies. Some galaxies also have a black hole in their center.
There at least 60 billion spiral galaxies in the universe because the spiral galaxies comprise of about 60 percent of all galaxies which are about 100 billion.
Other galaxies are moving away because the universe is expanding, but we are not at the centre of the universe.