The CMB is perfectly uniform
a. True
b. False
Indicate whether the statement is true or false
False
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Poor clusters
a. contain more than 1000 stars and are found in the halo of the galaxy. b. contain lots of young stars and are found in the disk of a spiral galaxy. c. contain more than 1000 galaxies and are generally elliptical in shape. d. contain fewer than 1000 galaxies and tend to be irregularly shaped. e. are found in the nucleus of the galaxy.
A solar or lunar eclipse will occur
a. when the Sun is near the line of nodes of the Moon, and the Moon is new or full. b. any time the Moon is new or full. c. when the Sun is near the solstice, and the Moon is new or full. d. half-way through an eclipse year. e. when the Sun is near the equinox, and the Moon is new or full.
Our Sun is a first-generation star.
a. true b. false
Protons and neutrons are held together by the
A. strong nuclear force. B. weak nuclear force. C. electromagnetic force. D. gravitational force.