Portal:Astronomy/Did you know/5


 * ... that although color-blind, Nicholas U. Mayall was better able to detect faint galaxies than most other astronomers?
 * ... that The Man in the Moone, a 1638 book by the English bishop Francis Godwin, is considered one of the first science fiction books?
 * ... that the galaxy Markarian 501 produces very high energy gamma rays?
 * ... that the Near-Earth object and Mars-crosser asteroid 2007 WD5 is estimated to have a 1-in-75 chance of colliding with Mars?
 * ... that hydroxyl megamasers were used to make the first detection of Zeeman splitting in a galaxy other than the Milky Way?