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A quiz to learn what kind of celestial body Mercury—the planet closest to the Sun—is!

Mercury is the celestial body that lies closest to the Sun among the planets of the solar system.

Some of you may have wondered why it’s called “Mercury” even though there is no water on it.

The name was given during an era influenced by China’s Five Elements philosophy—fire, water, wood, metal, and earth—which were thought to govern the world.

Therefore, it has nothing to do with the presence or absence of water.

In this way, Mercury holds truths that are surprisingly little known.

Seemingly familiar yet distant, seemingly known yet unknown—let’s use this quiz to deepen our understanding of Mercury!

A quiz to learn what Mercury, the planet closest to the Sun, is like! (11–20)

What is Mercury’s rotation period in days?

What is Mercury's rotation period in days?
  1. about 58 days
  2. about 88 days
  3. about 24 hours
See the answer

about 58 days

Mercury’s rotation period is equivalent to about 58.6 Earth days. This long rotation period is related to Mercury’s orbital period of about 88 Earth days, and the ratio of these two cycles means that one day on Mercury corresponds to two solar days (from sunrise to sunrise).

In conclusion

This time, we introduced a quiz about Mercury.

I hope you were able to learn at least a little about what kind of celestial body Mercury is and what characteristics it has.

Because its environment is far harsher than Earth’s, it is said that the existence of life is unlikely, and Mercury is also a difficult planet to explore.

Still, future advances in science may lead to new discoveries.