Star clusters are important to our study of stars because
a. all stars formed in star clusters.
b. the sun was once a member of a globular cluster.
c. they give us a method to test the our theories and models of stellar evolution.
d. they are the only objects that contain Cepheid variables.
e. all of the above
C
You might also like to view...
When a 4-cubic-ft block of wood floats in a fluid whose weight density is 60 pounds per cubic foot, 3/4 of the block's volume is submerged. The buoyant force on the block is
a. 60 lbs. b. 120 lbs. c. 180 lbs. d. 240 lbs. e. none of the above.
How does the total mass of the products of a nuclear fission reaction compare to the mass of the original elements?
A) greater B) less C) the same D) varies according to the reaction
Which of the following people did NOT accept a heliocentric model for the universe?
a. Kepler b. Copernicus c. Tycho d. Galileo e. Newton
Relate the Galaxy's spiral arms to the spiral-density wave theory
What will be an ideal response?