Why did the solar nebula flatten into a disk?
A) The interstellar cloud from which the solar nebula formed was originally somewhat flat.
B) The force of gravity from the Sun pulled the material downward into a flat disk.
C) As the nebula cooled, the gas and dust settled onto a disk.
D) It flattened as a consequence of collisions between particles in the spinning nebula, changing random motions into more orderly ones.
E) The force of gravity from the planets pulled the material downward into a flat disk.
D) It flattened as a consequence of collisions between particles in the spinning nebula, changing random motions into more orderly ones.
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A. 1.6 B. 1.5 C. 1.4 D. 1.3
A baseball weighs 1.5 N on Earth. Another type of ball weighs 1.5 N on the Moon. The ball with the greater mass is the
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In the light curve of a nova, the rise to maximum luminosity takes only a few ________
Fill in the blank(s) with correct word
The ability of a telescope to separate two closely spaced stars is called ________
Fill in the blank(s) with correct word