1.
When was the moon Mimas discovered?
Correct Answer
A. 1789
Explanation
The moon Mimas was discovered on September 17, 1789, by the astronomer William Herschel.
2.
What is the largest moon of Saturn?
Correct Answer
B. Titan
Explanation
The largest moon of Saturn is Titan. Titan is not only Saturn's largest moon but also one of the largest natural satellites in the entire solar system. It is known for its thick atmosphere and has been the target of scientific study, including the Cassini-Huygens mission, which provided valuable insights into its characteristics.
3.
When was the moon Hyperion discovered?
Correct Answer
C. 1848
Explanation
The moon Hyperion was discovered on September 16, 1848, by the American astronomer William Cranch Bond and his son George Phillips Bond. They observed Hyperion at the Harvard College Observatory in Cambridge, Massachusetts.
4.
Which moon of Saturn has cryovolcanoes?
Correct Answer
D. Enceladus
Explanation
The moon Enceladus is known for having cryovolcanoes, or "cryogeysers." These are geysers that erupt with icy plumes, and they have been observed on Enceladus's surface. These cryovolcanoes are believed to be driven by the moon's subsurface ocean, which is heated by tidal forces generated by Saturn's gravitational pull.
5.
How many moons does Saturn have as of 2023?
Correct Answer
B. 146
Explanation
The Saturn system is bustling with its collection of natural satellites, which includes both planet-sized bodies like Titan and peculiar, irregularly shaped moons resembling potatoes or ravioli. As of June 8, 2023, Saturn boasts a total of 146 moons orbiting the planet, displaying an impressive size range from moon Titan, even larger than the planet Mercury, to diminutive moons no larger than a sports arena.
6.
Which moon of Saturn is known for its prominent equatorial ridge?
Correct Answer
C. Iapetus
Explanation
The moon Iapetus is known for its prominent and distinct equatorial ridge. This ridge runs nearly all the way around the moon's equator, giving it a distinctive appearance. The exact origin of this ridge is still a subject of scientific study, but it is one of the unique features of Iapetus, making it stand out among Saturn's moons.
7.
When was the moon Dione discovered?
Correct Answer
B. 1684
Explanation
The moon Dione was discovered by the Italian-French astronomer Giovanni Domenico Cassini on March 21, 1684. Cassini made this significant discovery while he was observing the Saturn system, and Dione is one of Saturn's major moons.
8.
Which moon of Saturn is composed mostly of ice?
Correct Answer
A. Tethys
Explanation
The moon of Saturn that is composed mostly of ice is Tethys. Tethys is primarily made up of water ice and is known for its icy surface features.
9.
When was the moon Rhea discovered?
Correct Answer
B. 1672
Explanation
The moon Rhea was discovered by the Italian-French astronomer Giovanni Domenico Cassini on December 23, 1672. Cassini made this discovery while observing the Saturn system, and Rhea is one of Saturn's major moons.
10.
Which moon of Saturn has a distinct two-toned coloration?
Correct Answer
D. Iapetus
Explanation
The moon Iapetus has a distinct two-toned coloration. Iapetus is known for its unusual and striking appearance, with one hemisphere being significantly darker than the other. This stark color contrast is a notable feature of Iapetus and has intrigued astronomers and scientists for many years.
11.
When was the moon Phoebe discovered?
Correct Answer
D. 1899
Explanation
The moon Phoebe was discovered on March 17, 1899, by the American astronomer William Henry Pickering. Phoebe is one of Saturn's irregularly shaped outer moons and was the first moon of Saturn to be discovered photographically.
12.
Which moon of Saturn is named after a Titaness from Greek mythology?
Correct Answer
C. Tethys
Explanation
The moon Tethys of Saturn is named after a Titaness from Greek mythology. In Greek mythology, Tethys was the Greek goddess of freshwater who bore six thousand children to her husband Oceanus. Naming celestial bodies after figures from Greek and Roman mythology is a common practice in astronomy.
13.
When was the moon Titan discovered?
Correct Answer
C. 1655
Explanation
The moon Titan was discovered by the Dutch astronomer Christiaan Huygens on March 25, 1655. Huygens made this significant discovery while using a telescope. Titan is the largest moon of Saturn and is known for its thick atmosphere and unique characteristics.
14.
Which moon of Saturn is heavily cratered and has a surface resembling a sponge?
Correct Answer
D. Hyperion
Explanation
The moon Hyperion is heavily cratered and has a surface resembling a sponge. Its unusual appearance, characterized by numerous craters and a porous, sponge-like texture, makes Hyperion one of the distinctive moons in Saturn's system. This appearance is likely the result of a combination of factors, including its irregular shape and the accumulation of impact craters over time.
15.
When was the moon Enceladus discovered?
Correct Answer
D. 1789
Explanation
The moon Enceladus was discovered by the British astronomer William Herschel on August 28, 1789. Herschel made this discovery while observing the Saturn system, and Enceladus is one of Saturn's major moons. It has since become a subject of significant scientific interest due to its subsurface ocean and cryovolcanic activity.