In a fairly young star cluster, if the most massive stars are swelling up into giants, the least massive stars are:
A) also evolving off the main sequence as well.
B) continuing to shine as stable main sequence stars.
C) blowing off shells as planetary nebula instead.
D) collapsing directly to white dwarfs.
E) still evolving toward their ZAMS positions.
Question 2Distinguish an E0 from an E7 galaxy.
What will be an ideal response?
Question 3What is the most important factor that determines the thickness, and therefore strength, of the lithosphere?
A) pressure
B) viscosity
C) composition
D) internal temperature
E) distance of planet from Sun
Question 4What is true of Jupiter's magnetosphere?
A) Although its surface field is greater, since the planet is larger the total field is actually weaker than Earth's.
B) It does not trap protons and electrons, as Earth's Van Allen belts do.
C) It has a tail that extends at least to Saturn's orbit.
D) It is most extensive on the sunward side of the planet.
E) It is only slightly stronger than Saturn's.
Question 5If the ________ is good, the atmosphere is stable, and image quality is sharp.
Fill in the blank(s) with correct word
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