Jimmy Chen asked 2/24/2017 What if the moon and the sun switched size, mass and places so that the earth is orbiting the moon and the sun is orbiting earth?
Pravin Kale asked 5/4/2016 why to carry out moon / mars missions ? there is no water oxygen atmosphere ? to bring minerals from there is not viable
N. Harmonik asked 3/14/2016 Is it possible that at least one of the many planets out there is either flat or hollow?
Anonymous asked 11/8/2015 Riddle the ninth! What is made of wood, but no saw on Earth is sharp enough to cut?
Aljean Choong Totaan asked 7/20/2015 How long does the Solar System takes to take a galactical orbit in the Milky Way?