NASA’s Hubble opens the earliest window into the young Milky Way
The Milky Way, spanning over 100,000 light-years, is our galactic home. Among its many discoveries, the ESA’s Gaia mission has found that the Milky Way galaxy not only has a warp to its galactic disk, but that the warp in the disk precesses and wobbles, completing a full rotation for roughly every three revolutions of the Sun (in yellow) around the galactic center. The origin of the Milky Way’s rotation is not cosmic, but rather is thought to arise from the relative gravitational and tidal forces acting on it during various stages of galaxy formation. Credit: Stefan Payne-Wardenaar Growing throughout cosmic history, it now possesses 400 billion stars, and 150+ globular clusters. There are slightly over 150 globular clusters identified within 200,000 light-years of the galactic center, with an additional five or six to be found if we double the radius of this search. While most formed along with the Milky Way, a substantial fraction did not, and were brought in at later times when smaller galaxies, such as the Kraken and Gaia-Enceladus, were devoured …









