Comets are essentially big dirty snowballs, the kind you throw at someone you really don't like. They are mostly made of muddy stinky ice, and bits of dust and little rocks.
Comets are about the size of cities and towns, sort of like frozen lakes in space. We've had a few that were the size of big cities like L.A. and one that was even bigger. But the majority are…
Johann Bode and Johann Titius were best buds and they made a rule about planets.
If you've ever thrown a baseball into the air, you probably noticed it quickly returned to the Earth. The harder you throw it, the…Continue
Snorri sounds like a real hoot. If the 13th century Vikings had a dictionary, and looked up the word "hoot" I bet Snorri's image…