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A B C D E F G H I J K L M N O P Q R S T U V W X Y Z
Q
Quadrature
A point in the orbit of a superior planet where it appears at right
angles to the Sun as seem from Earth.
Quasar
An unusually bright object found in the remote areas of the universe.
Quasars release incredible amounts of energy and are among the oldest
and farthest objects in the known universe. They may be the nuclei of
ancient, active galaxies.
Quasi-Stellar Object
Sometimes also called quasi-stellar source, this is a star-like object
with a large redshift that gives off a strong source of radio waves.
They are highly luminous and presumed to be extragalactic.
A B C D E F G H I J K L M N O P Q R S T U V W X Y Z