A loop or sheet of gas hanging above an active region of the Sun is a(n) ________, often striking along the limb during total eclipses.
A) sunspot B) flare C) aurora D) prominence E) granule
Question 2
The star Vega has an absolute magnitude of about 4 and an apparent magnitude of about 0. Based on the definitions of absolute and apparent magnitude, we can conclude that ________.
A) Vega's surface temperature is cooler than the Sun
B) Vega is nearer than 10 parsecs from Earth
C) Vega's luminosity is less than that of our Sun
D) Vega has a parallax angle of 1/10 arcsecond
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