Astronomer's believe that a spiral galaxy may form:
A) from a collision between a small and large galaxy.
B) due to a quasar shutting down.
C) from the sudden contraction of an elliptical galaxy.
D) from the collision of two giant elliptical galaxies.
E) from the explosion of a dwarf irregular galaxy.
Correct Answer:
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Q21: Due to the galaxy density and collisions,
Q24: Gravity lensing lets us map the distribution
Q26: As we look at larger and larger
Q29: The pregalactic blobs had masses similar to:
A)the
Q30: Collisions between galaxies are thought to:
A)have stopped
Q31: Rotation curves for spiral galaxies show:
A)they are
Q32: What is true of spiral galaxies?
A)They are
Q34: According to the HST data, very distant
Q38: According to their rotation curves, most spiral
Q54: Star streams that are seen around the
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