what is halley's comet?Desribe it.
Answers
Answer :-
Halley's Comet or Comet Halley, officially designated 1P/Halley, is a short-period comet visible from Earth every 75–76 years. Halley is the only known short-period comet that is regularly visible to the naked eye from Earth, and the only naked-eye comet that might appear twice in a human lifetime.
Orbits: Earth
Discoverer: Edmond Halley
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Explanation:
Halley's Comet or Comet Halley, officially designated 1P/Halley,is a short-period comet visible from Earth every 75–76 years. Halley is the only known short-period comet that is regularly visible to the naked eye from Earth, and the only naked-eye comet that might appear twice in a human lifetime.[13] Halley last appeared in the inner parts of the Solar System in 1986 and will next appear in mid-2061 to 2062.
Halley's Comet on 8 March 1986
DiscoveryDiscovered byprehistoric (observation)
Edmond Halley (recognition of periodicity)Discovery date1758 (first predicted perihelion)Orbital characteristicsEpoch 17 February 1994 (2449400.5)Aphelion35.082 AUPerihelion0.586 AU
(last perihelion: 9 February 1986)
(next perihelion: 28 July 2061)[1]
Semi-major axis
17.834 AUEccentricity0.96714
Orbital period
75.32 yr
Mean anomaly
38.38°Inclination162.26°
Longitude of ascending node
58.42°
Argument of perihelion
111.33°Earth MOID0.0638 AU (9.54 million km)TJupiter-0.605Physical characteristicsDimensions15 km × 8 km[3]
Mean diameter
11 km[2]Mass2.2×1014 kg[4]
Mean density
0.6 g/cm3 (average)[5]
0.2–1.5 g/cm3 (est.)[6]
Escape velocity
~0.002 km/s
Rotation period
2.2 d (52.8 h) (?)[7]Albedo0.04[8]
Apparent magnitude
28.2 (in 2003)[9]