The asteroid belt is believed to be debris left over from the age of formation of the solar system; the tidal effects of ________ probably prevented formation of a major planet there
Fill in the blank(s) with correct word
Jupiter
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Why were the Russian Venera spacecraft so important to our understanding of Venus?
What will be an ideal response?
What are the observational pieces of evidence that confirm the existence of a three-part structure (bulge, disk, halo) to the Milky Way Galaxy?
What will be an ideal response?
The planet ________ has the least variation in temperatures on the surface between day and night
A) Mars B) Earth C) Mercury D) Venus
The Greeks abandoned their earliest cosmological theory (planets moving in simple circles around Earth) because
A) it did not agree with their observations of the planets.
B) it seemed messy and unsatisfying.
C) they came to believe that Earth should be at the center of things.
D) they came to believe that the sun should be at the center of things.
E) Actually, they never did abandon or revise their earliest theory--it was not altered until the time of Copernicus.