Guide to Space
How Big is the Moon?
[/caption] The Moon is one of the most significant objects in the night sky, second only in brightness to the…
Flat Earth Society
[/caption] The Flat Earth Society is an organization whose members adhere to the belief that the Earth is flat rather…
Celestial Body
[/caption]The term celestial body is as expansive as the entire universe, both known and unknown. By definition a celestial body…
Messier 99
Object Name: Messier 99 Alternative Designations: M99, NGC 4254, Pinwheel Galaxy Object Type: Type Sc Spiral Galaxy Constellation: Coma Berenices…
Messier 98
Object Name: Messier 98 Alternative Designations: M98, NGC 4192 Object Type: Type Sb Barred Spiral Galaxy Constellation: Coma Berenices Right…
Messier 97
Object Name: Messier 97 Alternative Designations: M97, NGC 3587, Owl Nebula Object Type: Type 3a Planetary Nebula Constellation: Ursa Major…
Earth Surface Temperature
[/caption] The average Earth surface temperature is 14° C. That's 287 kelvin, or 57.2° F. As you probably realize, that…
Venus Length of Day
[/caption] The Venus length of day is 243 days. But the story is a little stranger than that. Venus is…
Planets Fact Sheet
Mercury Mass: 0.3302 x 1024 kg Volume: 6.083 x 1010 km3 Average radius: 2439.7 km Average diameter: 4879.4 km Mean…
Neptune Fact Sheet
[/caption] The following Neptune fact sheet is based on NASA's excellent planetary fact sheets. Neptune is the 8th planet from…