61. What is the name of the largest type of galaxy?
a) Spiral galaxy
b) Elliptical galaxy
c) Irregular galaxy
d) Dwarf galaxy
62. What is the name of the cloud of gas and dust that is the birthplace of stars?
a) Nebula
b) Asteroid
c) Comet
d) Meteoroid
63. What is the name of the process by which a star ejects its outer layers and becomes a small, hot core?
a) White dwarf
b) Black hole
c) Supernova
d) Planetary nebula
64. What is the name of the planet in our solar system with the largest volcano?
a) Earth
b) Venus
c) Mars
d) Mercury
65. What is the name of the space probe that landed on the surface of a comet in 2014?
a) Voyager 1
b) Cassini-Huygens
c) New Horizons
d) Rosetta