The motion of gas in accretion disks and jets is ____.
a. well explained by Einstein's theory of general relativity
b. poorly understood, but may depend on magnetism
c. well explained by Kepler's laws.
d. poorly understood, but may depend on relativity
e. well explained by electromagnetic wave theory
Question 2
The wavelength of maximum intensity is useful in measuring the ____.
a. surface temperatures of an object from their colors
b. distance to an object from their colors
c. chemical composition of an object
d. motion of an object across the observer's line of sight
e. motion of an object toward or away from the observer
