[ETL]

The Milky Way contains over a hundred billion stars. Most are located in a disc with a dense, bulging center; the rest are spread out in a much larger spherical halo.

Stars circle around the Milky Way at hundreds of miles per second, and their motions contain a wealth of information about the past history of the Galaxy.

The fastest class of stars in our Galaxy are called hypervelocity stars, which are thought to start their life near the Galactic center to be later flung towards the edge of the Milky Way via interactions with the black hole.

Only a small number of hypervelocity stars have ever been discovered, and Gaia’s second data release provides a unique opportunity to look for more of them.

[Pete from Shawnee Mission]

Thanks for posting. I like Astronomy.

(Some people do not seem to know the difference between Astronomy and Climatology or Meteorology.)