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- short for ``quasi-stellar radio source''. Quasars are
the most luminous of active galaxies---they are the extremely active
nuclei of otherwise normal galaxies.
Quasars generate a huge
amount of energy within very tiny volumes. Because
they are most luminous things known, quasars can be seen at very large distances.
Looking like blue stars, they can be distinguished from stars by the presence of
broad emission lines instead of the
narrow absorption lines of normal stars,
their large redshifts because of their very
large distances (see the Hubble Law), and many quasars are strong radio
sources, unlike stars which have weak radio emission.
Glossary links (select a letter for definitions of astronomy terms
beginning with that letter):
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
last updated: 27 May 2001
Is this page a copy of Strobel's
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