Andromeda is one of the most famous galaxies after the Milky Way. The Andromeda Galaxy is in the Local group, where the Milky Way is. It is now known, in the 2000s, that Andromeda is 2.5 million light-years from Earth and there will be a collision between it and the Milky Way over 3 billion years, taken in the horse from the 2000s onwards. Andromeda is also an object of the Messier catalogue, being called Messier 31 or abbreviated M31. Scientists and breeders also call it NGC 224. It is one of the brightest, if not the brightest of Messier's objects. it is the largest galaxy in the Milky Way, but not the most massive. At one time it was thought to be the most massive if it is the largest, but some researchers and scientists are now proving that the Milky Way is actually more massive than Andromeda, because it contains more dark matter (Milky Way ). Andromeda is called one of the brightest Messier objects or even the brightest, because it has a magnitude of 4.4. Remember that any magnitude that is a maximum of 6 on the magnitude scale can be seen from Earth, so Andromeda can also be seen. The Andromeda galaxy has been known since 961, when the Persian astronomer Abdurrahman Sufi discovered Andromeda as a luminous object in space, and much later the French astronomer Charles Messier included it in the Messier catalogue, under the name Messier 31.Andromeda is called one of the brightest Messier objects or even the brightest, because it has a magnitude of 4.4. Remember that any magnitude that is a maximum of 6 on the magnitude scale can be seen from Earth, so Andromeda can also be seen. The diameter of the galaxy is approx. 141 ± 3 thousand light years. the light. According to calculations, it turned out in 2004 that Andromeda is actually at a distance from Earth of approx. 2.51 ± 0.13 million light years. These were done through the infrared I-SBF.
To give you an idea of how massive the Milky Way is, there is very little difference between it and Andromeda. Andromeda has: 1.23 × 10¹² M☉ The Milky Way has: 1.9 × 10¹² M☉. And the Milky Way produces somewhere approx. 3-4 solar masses per year, while Andromeda can barely make 1. The galaxy's discoveries were amplified at first sight by its telescope by the famous German astronomer Simon Marius in 1612, then first photographed by another famous astronomer, this time of English origin: Isaac Roberts.