Glossary - Astronomy Magazine

Comet C/2011 L4 (PANSTARRS)

Comet C/2012 S1 (ISON)

Glossary

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quadrillion 1,000,000,000,000,000 (in American usage)
quantum mechanics the physical laws that describe the behavior of matter at the atomic and subatomic level
quasar the highly energetic core of a young galaxy thought to be powered by a supermassive black hole; short for quasi-stellar object

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