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.
E
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Sorted spectral data and designed the stellar spectral types
A. Prism or A Diffraction Grating |
B. Annie Jump Cannon |
C. Temperature |
D. Spectroheliometer |
E. Continuous Spectrum |
F. Joseph Van Fraunhofer |
The Perseid meteor shower occurs each year in _____
A) May B) June C) July D) August
Light goes slower through glass than through air
a. True b. False Indicate whether the statement is true or false
Recall the raisin cake model of the universe and its analogy to our expanding universe. Suppose you measure the recession velocity (the speed at which any object is moving away from us) of Galaxy A to be 2000 km/s and the recession velocity of Galaxy B to be 6000 km/s. What can you conclude about the relative distances of these two galaxies?
A) Galaxy A is 3 times as far from us as Galaxy B. B) Galaxy B is 3 times as far from us as Galaxy A. C) Galaxy A is 6 times as far from us as Galaxy B. D) Galaxy B is 6 times as far from us as Galaxy A. E) The relative distances cannot be determined from the information in this problem.