skysurfer
27-07-2013, 05:42 PM
A great image of our Earth from Saturn.
http://www.nasa.gov/sites/default/files/styles/946xvariable_height/public/20130722_annotated_earth-moon_from_saturn_1920x1080.jpg?itok =DIJv2DwN
More pictures are from http://www.nasa.gov/mission_pages/cassini/main/index.html
To imagine: the Earth looks at most 2" large (mv=+3) and the Moon 0.5" (mv=+8) max. 48" separated.
So a 20cm telescope is required to see Earth as a (tiny) ball and binos are required to see the Moon and a 75cm scope is required to see the Moon as a ball.
7 billion people living on such a tiny 'star' like object !
http://www.nasa.gov/sites/default/files/styles/946xvariable_height/public/20130722_annotated_earth-moon_from_saturn_1920x1080.jpg?itok =DIJv2DwN
More pictures are from http://www.nasa.gov/mission_pages/cassini/main/index.html
To imagine: the Earth looks at most 2" large (mv=+3) and the Moon 0.5" (mv=+8) max. 48" separated.
So a 20cm telescope is required to see Earth as a (tiny) ball and binos are required to see the Moon and a 75cm scope is required to see the Moon as a ball.
7 billion people living on such a tiny 'star' like object !