Sgr A* is believed to be the center of the Milky Way galaxy because I. It lies in the general direction of the center of the galaxy based on observations of globular clusters in the plane of the Milky Way. II. Long wavelength dust penetrating images show it to be a region crowded with stars III. Orbits of stars around it indicate a mass several million times that of the Sun within a volume a few
light hours in size IV. Radio observations show it is a concentrated source at the center of swirling clouds of gas
a. I & II only
b. II & III only
c. I & IV only
d. II & IV only
e. All of I, II, III, & IV
E
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The first pulsar was discovered by _________ in November of 1967
a. Jocelyn Bell b. Isaac Newton c. Albert Einstein d. Walter Baade e. Edwin Hubble
The most basic of the sciences of physics, chemistry, and biology is
A) physics. B) chemistry. C) biology. D) none of the above
The reason the jovian planets lost very little of their original atmosphere is due to their:
A) rapid rotation. B) strong magnetic fields. C) ring systems. D) large mass. E) many moons.
Which one of the following reactions is the most similar chemically to combustion?
A) fusion in stars B) vaporization in the atmosphere C) respiration in animals D) fission in nuclear reactors E) photosynthesis in plants