supermassive black hole, NASA and Milky Way

The center of our Milky Way galaxy is hidden from the prying eyes of optical telescopes by clouds of obscuring dust and gas.
In 1920, astronomers Harlow Shapley and Heber Curtis held a Great Debate. Shapley argued that the spiral nebulae were small ...
NASA scientists have detected a star and trailing exoplanet that may be sailing through the Milky Way with unprecedented ...