One fact: Mercury is the smallest planet in our solar system
Diameter: ~ 4879 km
Moons: No
Type: Terrestrial planet
Axial tilt: ≈ ~ 0 degrees
Day: 1408 hours
Full orbit: 88 Earth days
Average surface temperature: ~ 167° Celsius, but can swing from 430 Celsius at day to
-180 Celsius at night.
Name Origin (English): Mercury is from Latin Origin from the Roman God for swiftness.
Origin: Formed about 4.5 billion years ago from gas and dust particles.
Atmosphere: Mercury does not have an atmosphere, instead it has an exosphere since it is so thin.
Because of this, the surface temperature on Mercury can swing from 430 Celsius at day to
-180 Celsius at night due to not having a sufficient atmosphere to trap heat. The atmosphere
is composed of hydrogen, helium, oxygen, sodium, potassium, calcium, magnesium, and argon.
