What planet is an inner planet and has a retrograde rotation?

Whats your favourite planet??

Wich planet is closest to the sun? Mercury Venus Mars Jupitar?

explain to me about the planet nibiru ? can we live on it? is it going to reach us?

what are they 9 planets

What properties cause a planet to have more or less gravity? And which properties do not impact gravity? Im curious.

Do you think that an elevator from the Earth to Extrasolar planets will ever be possible? Any comments or suggestions?

i am currently on a project that has brought me to the thought of a gyroscope as a source of balance. I am wondering if it ma...

What lovely names the other planets have... Mars, Venus, Neptune, Jupiter etc. Then there's us. Earth. Terra. dirt. EARTH. Yu...

Since silicon has the same properties as carbon (right?) then its possible for life to be centered around glass instead of ca...

We all know the earth is spinning, but how fast? And we dont get throwen off because of gravity, so shouldnt we all be being ...