Description : Velocity required by an object to orbit around Earth is A. 9 km s-1 B. 7 km s-1 C. 8 km s-1 D. 10 km s-1
Last Answer : 8 km s-1
Description : In 1971 which USA space probe was first to orbit another planet?
Last Answer : Mariner 9
Description : Is mars in an orbit with another solar body?
Last Answer : Mars orbits the Sun.
Description : In 1971 which USA space probe was first to orbit another planet