11) Which country launched Sputnik 1 into outer space?
12) What is the hottest planet in our Solar System?
13) What is the name of the first man-made satellite sent into Earth's orbit?
14) How far away is the Moon from Earth?
15) What country was the first to put a man on the Moon?
16) What is the name of the two stars that make up the binary star system closest to Earth?
17) What is the name of the telescope that will allow us to image black holes?
18) In what year was the first satellite launched into Earth’s orbit?
19) How many planets are in our Solar System?
20) What was the name of the first mission to land a spacecraft on the surface of Mars?