A Galaxy is far bigger than a nebula.
Yes. A nebula is just a big gas cloud. A galaxy will contain many nebulas.
The nebula in a galaxy is a dead star, long dead, possibly about to turn into a black hole. actually, its the opposite: nebula is like a cloud of space trash. when the "cloud" gets too big, it explodes. the bigger the explosion, the bigger the new star.
Yes, much bigger. There are many stars in our galaxy, thousands of millions of them. Everything you see in the night sky is in our galaxy, including the Moon, so the galaxy is much bigger.
The galaxis are bigger than planetary nebulae, that are bigger than planetary systems.
Earth is IN a galaxy - as is the nebula.
Nebula.
A nebula galaxy does not exist.
The Orion nebula is part of our own galaxy (the Milky Way). The Orion nebula is about 1500 light-years away from us. Our galaxy is about 100000 light-years across.
Galaxy
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It is a nebula.
Nebula exist in all galaxies.