Our sun and the planets that circle it are part of a galaxy called the Milky Way. Its name comes from the Greek galaxias ...

For comparison, the supermassive black hole in the Milky Way has about 4 million solar masses. Elsewhere in the universe, there are supermassive black holes with billions of times more mass than ...

Gaia’s goal was to create a 3D map of our entire galaxy, and so far it has revealed the structure of the Milky Way in the greatest detail ever obtained. It has uncovered evidence that our galaxy ...