There are maps of nearby regions of the Universe - the parts that we can see. It is very likely that there are parts of the Universe that are so far away that we can never reach them nor see them, even with the best of instruments.
Current estimates of the number of galaxies
are in the neighborhood of 200 billion.
In fact, galaxies have an enormous mass.In fact, galaxies have an enormous mass.In fact, galaxies have an enormous mass.In fact, galaxies have an enormous mass.
Because irregular galaxies have no definite shape.
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.
Yes galaxies emit light
That is a difficult question to fully answer as types of galaxies are not fully defined. A ball park figure would be dwarf galaxies, or spiral galaxies depending on the area in question. See related question for a full breakdown.
WikiSky will not map all 100 billion galaxies in the observable universe
WikiSky will be unable to map all the 100 billion galaxies in the universe considering that there are most likely more than 100 billion galaxies.
WikiSky will be unable to map all the 100 billion galaxies in the universe, considering that there are most likely more than 100 billion galaxies.
No, because it will be impossible for the SDSS telescope to map out all 100 billion galaxies in the observable universe.
No, because it will be impossible for the Hubble Space Telescope to map out all 100 billion galaxies in the observable universe.
It will be impossible for the Aladin Sky Atlas to map all 100 billion galaxies in the observable universe.
It will be impossible for the Sloan Digital Sky Survey to map and redshift all 100 billion galaxies in the observable universe.
No, because it will be impossible for Hubble make a 3D map of at least 100 billion galaxies (i.e. 60 billion spiral and barred spiral galaxies, 20 billion lenticular galaxies, 15 billion elliptical galaxies, and 5 billion irregular/peculiar galaxies) in the observable universe, at distances up to 13 billion light-years; since the observable universe is 13.7 billion light-years in diameter.
No, because it will be impossible for astronomers to survey at least 100 billion galaxies (each with 100 billion stars) to make a 3D map of the observable universe.
No. Such a task would be impossible.
who discovered the galaxies who discovered the galaxies
Spiral galaxies, barred spiral galaxies, elliptical galaxies, and irregular galaxies