Because it dwells in the galactic plane, where it may easily be covered by the Milky Way's 400 billion stars, the stellar stream has stayed hidden from astronomers for a long time.
For several years, the scientific consensus is that the dark mass in the middle of the Milky Way, designated Sagittarius A*, is a black hole - and a new study is challenging the widely-accepted notion.
Dark Matters are just one of the few cosmic questions we still face up to this day. Experts believe that the revelation to the dark matter particles might mean more than we expect.
Astronomers released a new all-sky map of the outermost regions of the Milky Way to show information on small galaxies that traveled through its galactic halo.
Vast halo of dark matter around Tucana II is said to be five times larger than previously estimated. The dwarf galaxy is 163,000 light years from Earth.
Scientists answered how the Magellanic Stream from two small galaxies that entered the Milky Way could have gained mass that is a billion times more massive than the sun.
After pouring through data from the Atacama Large Millimeter/ submillimeter Array (ALMA), a team of astronomers has found a distant galaxy similar to our own Milky Way.