Where is Mount Olympus Mons located?How far is outer-space from the surface of the earth?The nearest star to earth. It's an easy one...Which is the most distant object we can see with our naked eyes?How many moons does Pluto have? AnswersMars. It has a height of about 25 km.100 km.Proxima Centaurus? No! It's the sun!Andromeda Galaxy.Five moons. They are Charon, Hydra, Nix, Kerberos and Styx.