Astronomers believe that most of the matter that makes up the universe is not detected by any part of the electromagnetic spectrum. This mysterious matter is called ______________.
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Q172: A point in the universe where the
Q173: Our home galaxy is called the _.
Q174: "All distant galaxies are moving away from
Q175: The recent modification of the standard Big
Q176: Another name for a pulsar is _.
Q178: A(n) _is denser than a neutron star.
Q179: A Type II supernova can form a(n)
Q180: The dying glow of the Big Bang
Q181: Calculate the distance to the Sun in
Q182: A star of magnitude 0 is how
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