Halley's Comet
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Halley's Comet, Comet Halley, or sometimes simply Halley, officially designated 1P/Halley, is the only known short-period comet that is consistently visible to the naked eye from Earth, appearing every 75–79 years. It last appeared in the inner... Wikipedia
Predicted next perihelion: July 28, 2061
Last perihelion: February 9, 1986
Apparent magnitude: 28.2 (in 2003)
Discovered: 1758
Radius: 3.4175 mi
Discoverer: Edmond Halley
Period: 76 Earth years