The research team has long believed that our galaxy was made by two different galaxies. But I didn't know how and when to put it together. Therefore, researchers measure the position, brightness and distance of about one million stars precisely from data collected by the Gaia space telescope of the European Space Agency (ESA), and contain no metals (such as hydrogen and helium). 39, it does not contain the stars. The density of the element was investigated.
As a result, almost the same age stars can be divided into two groups, "more blue and less metal" and "more red and more metal", while the more blue stars are, it appears that "the chaotic movement" was shown. And it was judged that this was the star's departure from the dwarf galaxy Gaia-Enceladus that collided with the young Galaxy Galaxy.
Perhaps the Milky Way Galaxy and this small galaxy have been assimilated for millions of years after the collision. And this collision contributes to the formation of a star that runs through 4 billion years, and the gas from & # 39; a small galaxy falls to the center of a galaxy galaxy to form the disk from & # 39; a current galaxy galaxy, the remaining part is called galaxy halo The researchers think they have constructed the part to light outside.
By the way, this is not the first story that one galaxy gets with another set and one. The Andromeda Galaxy, which & # 39; s in & # 39; Being a Galaxy Galaxy, it is also said to include the Galaxy, which was almost two billion years old. And the Andromeda Galaxy is predicted to clash with our Milky Way Galaxy in about 4.5 billion years from now.