21. Which planet is known as the “Ice Giant”?
a) Uranus
b) Neptune
c) Saturn
d) Pluto
Answer: a) Uranus and b) Neptune
22. Which planet was discovered by the Voyager 2 spacecraft in 1989?
a) Neptune
b) Uranus
c) Saturn
d) Jupiter
Answer: a) Neptune
23. What is the name of the spacecraft that orbited Saturn from 2004 to 2017?
a) Cassini
b) Galileo
c) Voyager 2
d) New Horizons
Answer: a) Cassini
24. What is the name of the largest moon of Saturn?
a) Io
b) Titan
c) Europa
d) Enceladus
Answer: b) Titan
25. What is the name of the largest moon of Uranus?
a) Triton
b) Callisto
c) Miranda
d) Titania
Answer: d) Titania
