Presumably all of them. However, we're too far away from any galaxy except our own to actually see the nebulae inside them.
Hubble discovered that the nebulas were galaxies based on the powerful telescope at Mt Wilson. The second discoveries was the red shift relationship v=HD shows that the galaxies were outside our own galaxies definitely and quantitatively, using light sources in galaxies that were standard sources that could calibrate the distance.
They are either other solar systems, nebulas (Dead solar systems) Blackholes, other galaxies or stars that have no orbits
Because of their age, elliptical galaxies are believed to have older stars and less gas and dust in their insterstellar medium than other types of galaxies, and thus their nebulae are less common. However, nebulae are presumed to exist in almost all galaxies; and some recent observations hint that the central black holes of elliptical galaxies may tend to preserve interstellar gas by preventing it from cooling enough for star formation.
Stars form in nebulas. They're like star nurseries. The gas and dust in nebulas helps to form stars in their early stages.
stellar nebulas are the birthplace of stars. 1st of the sequence in the lifecycle of stars.
Hubble, in his studies of Nebulas which turned out to be galaxies.
Nebulas could be located in any galaxy.
There are many types of nebula and they can form within any galaxy. Generally, the normal types of nebula - planetary and supernova remnants will occur in the younger galaxies, so at a push spiral galaxies.
Cities can be seen from space.
Look up in the sky with a good telescope, and find things that are too fuzzy-looking to be stars. Some of them are nebulas, and a few may be comets - but a lot of them are other galaxies.
All sorts of things. The Sun, the Moon, planets, asteroids, meteors, galaxies, nebulas, satellites and other things.
who discovered the galaxies who discovered the galaxies
Hubble discovered that the nebulas were galaxies based on the powerful telescope at Mt Wilson. The second discoveries was the red shift relationship v=HD shows that the galaxies were outside our own galaxies definitely and quantitatively, using light sources in galaxies that were standard sources that could calibrate the distance.
Hubble discovered that the nebulas were galaxies based on the powerful telescope at Mt Wilson. The second discoveries was the red shift relationship v=HD shows that the galaxies were outside our own galaxies definitely and quantitatively, using light sources in galaxies that were standard sources that could calibrate the distance.
They are either other solar systems, nebulas (Dead solar systems) Blackholes, other galaxies or stars that have no orbits
Hubble discovered that the nebulas were galaxies based on the powerful telescope at Mt Wilson. The second discoveries was the red shift relationship v=HD shows that the galaxies were outside our own galaxies definitely and quantitatively, using light sources in galaxies that were standard sources that could calibrate the distance.
Because that is what galaxies are "made" up of.