When 17^th Century Astronomer _______ First Viewed Jupiter with His

Q49: The giant meteor impact at the end

Q50: _ is the smallest of the inner

Q51: The surface of Venus is hidden by

Q52: Martian winds have created _.<br>A) polar ice

Q53: Of all the planets in the solar

Q55: The nucleus of a comet is a

Q56: Astronomers think that most comets come from

Q57: The four planets nearest the sun are

Q58: Our galaxy is called the _.<br>A) Oort

Q59: All the planets are exactly the same