The nucleus, or main solid body, of a comet has a typical size of:
A) a few centimeters.
B) a few meters.
C) a few kilometers.
D) a few hundred kilometers.
E) a few thousand kilometers.
C
Physics & Space Science
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What did ancient civilizations achieve in astronomy?
a. predicting eclipses b. time keeping c. monitoring lunar cycles d. predicting seasons of agriculture e. all of the above
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Stony meteorites are common among falls
a. True b. False Indicate whether the statement is true or false
Physics & Space Science
Telescopes being planned for the study of the earliest stages in galactic lives will be optimized for observations in
A) visible light. B) infrared light. C) radio waves. D) X-rays.
Physics & Space Science
As a star begin to form the initial energy source is from
a. nuclear fusion. b. nuclear fission. c. gravitational potential energy. d. magnetic fields.
Physics & Space Science