jhuapl11 小时
Ryschkewitsch Selected as Fellow by World’s Largest Aerospace Technical Society
Former APL Space Exploration Sector Head Mike Ryschkewitsch has been selected as a fellow by the American Institute of ...
Carnegie Institution for Science13 小时
Hubble's Famous M31 VAR! plate
On the night of October 5-6, 1923, Carnegie astronomer Edwin P. Hubble took a plate of the Andromeda Galaxy (Messier 31) with the Hooker 100-inch telescope of the Mount Wilson Observatory. This plate, ...