Portal:Astronomy/Did you know/8


 * ... that Oscar Monnig donated one of the largest private collections of meteorites to Texas Christian University?
 * ... that at first light in 1987, the William Herschel Telescope was the third largest single optical telescope in the world, and is still the second largest in Europe?
 * ... that a Bok globule is a dark cloud of dense dust and gas, first observed by astronomer Bart Bok in the 1940s, in which star formation is taking place within the H II region?
 * ... that the aerial telescope is a type of very long focal length refracting telescope built in the second half of the 17th century that did not use a tube?
 * ... that the galaxy pair Arp 147 contains a ring of nine black holes?