Glossary - Astronomy Magazine

Comet C/2011 L4 (PANSTARRS)

Comet C/2012 S1 (ISON)

Glossary

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jet a narrow stream of gas or particles ejected from an accretion disk surrounding a star or black hole
jet stream a high-speed, wandering wind current in the upper troposphere that blows from west to east and affects weather

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