The Andromeda galaxy is 2.54 million light years away from Earth, which means that it takes 2.54 million years for light from Earth to reach it. This distance is an accepted average of the results of separate studies of the distance.
The Andromeda galaxy is the closest spiral galaxy to the Milky Way and can be seen with the naked eye. It is also one of the brightest objects in the sky, with an apparent magnitude of 3.4. The Andromeda galaxy has roughly the same mass as the Milky Way but contains twice the number of stars, estimated at around one trillion. Astrologists predict that in 3.75 billion years, the Andromeda Galaxy will collide with the Milky Way, forming a large, elliptical galaxy.Learn More
Far from being a galaxy, Orion is the name of a nebula approximately 1,500 light-years from Earth. In the Earth's night sky, the nebula is just visible as part of the "belt" of the constellation of Orion.Full Answer >
The Milky Way Galaxy has a length of about 1,000,000,000,000,000,000 kilometers, or 100,000 light years. A light year is the distance that light travels in one year.Full Answer >
The shape of our galaxy, the Milky Way, is a spiral. A bulge of older stars exists at the center of the spiral and the arms of the spiral contain newer stars. A black hole possibly exists in the very center of the Milky Way.Full Answer >
The primary difference between lenticular and spiral galaxies lies in the presence or absence of spiral arms around the galaxy's central bulge. According to the Sloan Digital Sky Survey, spiral galaxies have two distinct regions, a large central bulge and the outlying spiral arms. Lenticular galaxies also have a central bulge, but their outlying stars are less organized and more diffuse.Full Answer >