Our local group consists of
A) 1 major galaxy.
B) 2 major galaxies.
C) 3 major galaxies.
D) about a dozen major galaxies.
Answer: C
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Isaac Asimov, noted popularizer of science and science fiction author, has addressed overpopulation: "democracy cannot survive overpopulation. Human dignity cannot survive [overpopulation]. Convenience and decency cannot survive [overpopulation]
As you put more and more people onto the world, the value of life not only declines, it disappears. It doesn't matter if someone dies, the more people there are, the less one person matters." Respond to Asimov's statement by discussing any evidence available.
The reason why ancient astronomers thought that Earth could not be moving was because stars lacked any measurable parallax beyond one degree
a. True b. False Indicate whether the statement is true or false
Protostars are in hydrostatic equilibrium
a. True b. False Indicate whether the statement is true or false
As a block of ice at 0°C melts, the block absorbs energy
A) and decreases in temperature. B) and increases in temperature. C) without a temperature change. D) all of the above E) none of the above