No, most stars you see are stars within our own galaxy, the Milky Way
Galaxies vary a lot in size, from dwarf galaxies that have a few hundred million stars, to huge galaxies with a hundred trillion stars. (That's a ratio of about 1 to a million.)Our own galaxy has somewhere between 200 and 400 billion stars. Actually, most galaxies are quite a bit smaller than our own galaxy, since dwarf galaxies occur in larger numbers.
Older stars
Galaxies are vast collections of stars. So I guess you could say that a big group of stars forms a galaxy. Our galaxy has many big clusters of stars within it, so not all star clusters are galaxies. If you have a cluster of several million or billion (or trillion) stars surrounded by a lot of empty space, that is probably a galaxy.
Most new, young, stars can be found in the arms of spiral galaxies
That is related to their past history. Many galaxies have undergone collisions with other galaxies; this takes out most of the interstellar gas, and the galaxies can no longer form new stars. If I remember correctly, such galaxies will change into elliptical galaxies.That is related to their past history. Many galaxies have undergone collisions with other galaxies; this takes out most of the interstellar gas, and the galaxies can no longer form new stars. If I remember correctly, such galaxies will change into elliptical galaxies.That is related to their past history. Many galaxies have undergone collisions with other galaxies; this takes out most of the interstellar gas, and the galaxies can no longer form new stars. If I remember correctly, such galaxies will change into elliptical galaxies.That is related to their past history. Many galaxies have undergone collisions with other galaxies; this takes out most of the interstellar gas, and the galaxies can no longer form new stars. If I remember correctly, such galaxies will change into elliptical galaxies.
most ellipical galaxies have old stars
constellations are actually pictures that the stars seem to be arranged in from particular point of view, while nebulae are places where stars form. Both the Orion Nebula and the stars in the constellation Orion are visible from Earth, and both are in the Milky Way Galaxy, of which we are also a member. In fact, most things that you see in the night sky are part of our galaxy.
It's not "galaxy stars", but galaxies, that have the black holes at their center.All, or most, galaxies have a giant black hole at their center.
No, the vast majority of stars are outside the Milky Way galaxy. However, most of the stars we can actually see as individual stars are in the Milky Way. About the only exception is supernovae ... those are so bright that we can distinguish them even in other galaxies.
The brightness of normal galaxies is mainly due to stars; quasars are believed to get most of their energy output from the black hole at their center.
Yes. However, the current rate of star creation is less than when the galaxies were younger.Yes. However, the current rate of star creation is less than when the galaxies were younger.Yes. However, the current rate of star creation is less than when the galaxies were younger.Yes. However, the current rate of star creation is less than when the galaxies were younger.
born within the clouds of dust and scattered throughout most galaxies.