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22h
answered Why do (most of) the planets rotate counterclockwise, i.e. the same way the Sun does?
1d
comment Why do (most of) the planets rotate counterclockwise, i.e. the same way the Sun does?
Actually for Venus and Uranus it's not the spin direction that has been changed, it's the planet's axis which has been turned upside down for Venus and 90º for Uranus.
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comment Why don't planets give off their own light?
That is the total percentage of H and He in the universe.
2d
reviewed Reopen Why don't planets give off their own light?
2d
awarded  Custodian
2d
reviewed Leave Closed What is the secret behind the existence of gravitational force?
2d
comment Why don't planets give off their own light?
Thanks @Walter, you are right, but the surface temperature comes directly from the energy generated at the core. As you say a planet emits light a longer wavelengths since it's cooler than a star.
Aug
19
revised How was an infrared picture of the entire universe taken?
Bigger picture and it's reference.
Aug
19
answered Why don't planets give off their own light?
Aug
19
revised Why aren't there galaxy-sized balls of iron out there?
Typo, galaxy instead of gravity.
Aug
19
suggested suggested edit on Why aren't there galaxy-sized balls of iron out there?
Aug
19
suggested suggested edit on How was an infrared picture of the entire universe taken?
Aug
19
answered How was an infrared picture of the entire universe taken?
Aug
19
answered Why do some celestial bodies have atmospheres, and not others?
Aug
12
reviewed No Action Needed Do we expect life to develop only in certain regions of the galaxy?
Aug
12
answered Difference between quasar and Active Galactic Nuclei?
Aug
11
comment Python troubles
This question appears to be off-topic because it is about Programming or image edition.
Aug
11
reviewed No Action Needed Are multiple satellites required to handle geostationary orbits?
Aug
6
reviewed No Action Needed What is CMB radiation doing to the universe?
Aug
6
reviewed Leave Open Why does this twilight sky flat field have a grid of dark pixels?