1.   Astronomers also believe that the absence of a distorting atmosphere and radio-signal interference makes the moon a perfect site for telescopes and other types of observatories.

2.   Astronomers believe that as solid material condensed out of the gaseous early universe, little bits were drawn together either by collisions or by gravity and grew into planets.

3.   Astronomers believe that background marks the beginning of the universe, he said, so it would be the edge.

4.   Astronomers believe it will hasten the search for black holes.

5.   Astronomers believe that many galaxies harbor black holes at their centers, where gas and dust tend to drain from the starry surroundings.

6.   Astronomers believe that observers on Earth are seeing the southern hemisphere of the comet as its nucleus rotates.

7.   Astronomers believe that all planets, including Earth, originally formed from such disks.

8.   Astronomers believe the nebula that became our sun and its planets was made by many supernovas throughout the history of our Milky Way galaxy.

9.   Astronomers believe these massive stars ended their short lives more violently than even the biggest stars that go supernova in the modern universe.

10.   Astronomers believe Venus is suffering from a runaway greenhouse effect, its thick carbon dioxide atmosphere trapping heat and creating the hellish conditions now prevailing.