Multiple Choice
Cepheid Variables are stars whose brightness varies in a predictable manner so that the absolute magnitude of the star can be determined,and this allows the ________ of the star to be determined.
A) size
B) distance from Earth
C) velocity
D) direction of motion
E) composition
Correct Answer:

Verified
Correct Answer:
Verified
Q74: Prior to the formation of the protostar,_.<br>A)the
Q75: The Sun belongs to this class of
Q76: Fluorescence occurs when _.<br>A)visible light is converted
Q77: Degenerate matter can have densities 1 million
Q78: A neutron star theoretically will form from
Q80: The largest known galaxies are _.<br>A)spiral<br>B)barred spiral<br>C)elliptical<br>D)irregular<br>E)round
Q81: Hubble's law states that galaxies are receding
Q82: The reason scientists believe the reflective bright
Q83: Which fate of the universe is currently
Q84: Stars spend most of their life span