March 25th in Astronomy and Space Science
![]() | 1655 | Dutch astronomer Christiaan Huygens discovers Titan, the largest moon of Saturn. He was using a refractor of his own design that gave a magnification of 50×. |
![]() | 1961 | USSR launches the fifth and final unmanned Vostok test carrying the dog Zvezdochka ("Little Star") and a dummy clad in a spacesuit. The spacecraft descends after one orbit and the dog is ejected and lands safely by parachute. |