Top Ten Facts About the Planet Mercury

The Top Ten

1 A year on Mercury is 88 days long

I learned this from a Dr. Amy Mainzer interstitial. I don't watch RJG to learn things, but occasionally they will teach things that I never knew. On Mercury, you could celebrate your birthday every 2-3 months.

2 Mercury is the smallest planet in the Solar System
3 It is unknown who discovered Mercury

Hmm, I wonder who did.

4 Mercury is named for the Roman messenger to the gods.
5 Mercury is only the second hottest planet.

Mercury is closer to the Sun but Venus is the hottest planet. This excerpt from a RJG song will help you understand:
"But that atmosphere's like a greenhouse
That traps all the sun's heat in
And those clouds of carbon dioxide make Venus!
Earth's broiling hot twin! "

6 Mercury does not have any moons or rings

Well, obviously. Only the outer planets have rings, and they have way more moons. Earth only has one moon, while Mars has two, and Mercury and Venus have none.

7 Mercury can only be seen during twilight
8 A day on Mercury equals 176 Earth days
9 Mercury has a thin atmosphere

Mercury has only 38% of the gravity on Earth. Mercury isn’t able to hold the atmosphere it has and it instead gets blown away by solar winds.

10 Mercury is the most cratered planet

Many of Mercury's craters are named after famous writers and artists.

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