View Single Post
Old 11-01-20, 15:11   #4540
Blackmoor
Member
 
Blackmoor's Avatar
 
Joined: Apr 2005
Posts: 15,411
Default



Watch the Earth rotate.

Using a tracking mount aligned with the north star, a photographer took photos every 12 seconds for 3 hours. The camera is looking at the same part of the milkyway whilst you see the Earth move.
Blackmoor is offline   Reply With Quote