Mercury | skyatnight

Mercury Info

* A little over 3000 miles in diameter and 36 million miles from the sun.

* The smallest planet in our solar system only slightly larger than our moon.

* Extremely cold at night and blisteringly hot during the day.

* Largely molten metallic core with an outer harder shell of about 250 miles thick.

* Unlike other planets Mercury surface is not altered by volcano's so will always have it’s old craters.

Mercury's thin atmosphere, or exosphere, is composed mostly of oxygen (O2), sodium (Na), hydrogen (H2), helium (He), and potassium (K).

* Mercury is the fastest planet and makes a complete orbit around the Sun in 88 Earth days.

* One day = 59 Earth days.

* Mercury has no moon of it’s own.