An encounter in which a large galaxy absorbs a smaller galaxy is referred to as
A. "Galactic cannibalism".
B. "Galactic assimilation".
C. "Galactic absorption".
D. "Galactic merger".
Answer: A
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What is differentiation in planetary geology?
A) the process by which gravity separates materials according to density B) the process by which different types of minerals form a conglomerate rock C) any process by which a planet's surface evolves differently from another planet's surface D) any process by which one part of a planet's surface evolves differently from another part of the same planet's surface E) any process by which a planet evolves differently from its moons
A hot B8V star whose spectra shows a high metallicity is most likely a _____ star
A. Pop III
B. Pop II
C. Pop I
D. Dark Matter Star
Meteor showers are
A) usually annual events, as the orbits again intersect. B) caused by the Earth passing near the orbit of an Earthgrazing asteroid. C) caused by the Earth passing near the orbit of an old short-period comet. D) Both A and B are correct. E) Both A and C are correct.
Sonic Booms: As a supersonic airplane increases its speed more and more, the half-angle of the conical shock wave
A. increases. B. decreases. C. is not affected.