At the heart of the Milky Way is a dense ball, of old stars known as the central buldge. The stars surround the galactic nucleus, which may contain a supermassive black hole.
Extrasolar planets. Exo-planets. Searching for extrasolar planets. Searching for exo-planets. Earth-like planets in the Milky Way. Exoplanets and extra-solar planets, or exoplanets and extra-solar planets. Planets around others stars are called extrasolar planets. What is an extrasolar planet? Astronomy, or astronomy and finding planets.
