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
There is only one star in the solar system that Earth is located in, and that is the sun. Solar systems are named as such because each one is made up of a main star or sun, which has a gravitational field and objects surrounding it. The nearest known star to the Earth's solar system is over four light years away.Full Answer >
Main sequence stars are stars in the phase where they are fusing hydrogen atoms to form helium. Once a star runs out of hydrogen and starts fusing helium to form heavier elements, a star enters its dying phase.Full Answer >
The gases that surround a star or planet — called the object’s atmosphere — vary from one celestial object to the next. Many planets have complex atmospheres, but stars usually have simple ones. As with the Earth’s sun, the atmospheres of most stars are composed of hydrogen and helium. However, a few neutron stars with oxygen-rich atmospheres have been documented.Full Answer >
The brightest star visible from Earth is Sirius, located in the Canis Major constellation. There are many very bright stars in the night sky that are visible from Earth, and as the moon makes its orbit it does pass near or in front of several of these.Full Answer >