MERCURY
Mercury has a lot In common wilh Earth's moon. They're about the some size and both hove solid, heavily-cratered ground. Instead of o
AVG TEMP: 167° C ■ 333° F
MASS: 0.055 EARTHS ‘ Diameter: 3,032 mi
4,879 km .
ORBIT:
I doy = 176 Earth days I year = 0.241 Earth Years MOONS: 0
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DARK MATTER
The universe is filled with matter: You see it all around you.
Invisible to the human eye, dark matter is a type of matter that is very different from the "ordinary" matter we know so well. Many scientists say dark matter exists because we can see the electromagnetic effects it has on
