Solar system, SSB, and Galaxies review

What best describes a comet's orbit around the sun?

Why are "dwarf" planets not considered real planets?

What 2 observations convinced Galileo of the heliocentric model?

All of the known dwarf planets except Ceres have orbits beyond Neptune. Where is Ceres?

The heliocentric model was put forth by ______.

We often experience meteor showers on Earth as we travel through _____.

_____ keeps planets away from the sun, while _____ pulls planets toward the sun.

______ determined the planets orbits were more oval (elliptical) than circular.

The outer planets are ____ and ____.

Mars can boast that it has the _____ in the solar system.

What do the inner planets have in common?

Where do most meteoroids come from?

We live in the "Goldilocks Zone." This means what?

What's the official name for a "shooting star?"

Nicknamed a "dirty snowball"

All gas giants have atmospheres made mostly of hydrogen and ____.

What do the outer planets have that the inner planets don't?

If Saturn's gravity suddenly increased, what could happen to its rings?

How long does it take light to reach us from a star 36,000 light years away?

Why is Venus called our "sister" or "twin" planet?