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Comet Encke
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Comet Encke, or Encke's Comet, is a periodic comet that completes an orbit of the Sun once every 3.3 years. Encke was first recorded by Pierre Méchain on 17 January 1786, but it was not recognized as
Comet Encke photographed from the Kitt Peak Observatory on 5 January 1994.
Comet Encke photographed from the Kitt Peak Observatory on 5 January 1994.
Artist's impression of the CONTOUR spacecraft making a flyby of a comet.
Artist's impression of the CONTOUR spacecraft making a flyby of a comet.
A Spitzer image of Encke and its debris trail in infrared light
A Spitzer image of Encke and its debris trail in infrared light
Hyakutake Color
Hyakutake Color
Halley's Comet
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Halley's Comet is the only known short-period comet that is consistently visible to the naked eye from Earth, appearing roughly every 74–79 years. It last appeared in the inner parts of the Solar Syst
Comet Encke
…by Pierre Méchain on 17 January 1786, but it was not recognized as a periodic comet until 1819 when its orbit was computed by Johann Franz Encke. Like Halley's Comet, it is unusual in its being named after the calculator of its orbit rather than its discoverer. Like most comets, it has a very low albedo, reflecting…
Halley's Comet photographed by William Liller from Easter Island on 8 March 1986
Halley's Comet photographed by William Liller from Easter Island on 8 March 1986
"I must entreat you to procure for me of Mr Flamsteed what he has observed of the Comett of 1682 particularly in the month of September, for I am more
"I must entreat you to procure for me of Mr Flamsteed what he has observed of the Comett of 1682 particularly in the month of September, for I am more and more confirmed that we have seen that Comett now three times, since yͤ Yeare 1531, he will not deny it you, though I know he will me." —Excerpt of Halley's letter to Newton about comet's orbits (September 28, 1695)
Jamaican polymath Francis Williams (portrait attributed to William Williams, c. 1760). The only contemporary illustration of an astronomer detecting t
Jamaican polymath Francis Williams (portrait attributed to William Williams, c. 1760). The only contemporary illustration of an astronomer detecting the comet's return.
Orionid meteor originating from Halley's Comet streaking the sky below the Milky Way and to the right of Venus
Orionid meteor originating from Halley's Comet streaking the sky below the Milky Way and to the right of Venus