Which space flight sent the pictures of moon’s farside and when?
Which is the star nearest to earth?
How far from earth, is the moon?
How many moons do mars have?
What is the difference between a star, satellite and a planet?
Explain is pluto really a planet?
Tell me how long is a year on saturn?
Does non-carbon based life exist somewhere in the universe?
What is the constant called that is the average flux of the suns energy arriving at the earth?
Is the gravitational pull on an object equalized if the object is at the centre of a planet, i.e. Surrounded by the mass of the planet, which is creating the gravity?
Tell me how many moons does neptune have?
Explain how was the moon formed?
How long is it until our solar system ceases to exist?
When a superior planet is at quadrature in reference to the earth, what is its elongation in degrees?
Which unmanned space vehicle fetched roak pieces from the moon?