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Comet nucleus
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The nucleus is the solid, central part of a comet, formerly termed a dirty snowball or an icy dirtball. A cometary nucleus is composed of rock, dust, and frozen gases. When heated by the Sun, the gase
The nucleus of Comet Tempel 1
The nucleus of Comet Tempel 1
Tempel 1 and Hartley 2 compared
Tempel 1 and Hartley 2 compared
C/2006 W3 (Christensen) – emitting carbon gas
C/2006 W3 (Christensen) – emitting carbon gas
Surface of the nucleus of Comet 67P from 10 km away as seen by Rosetta spacecraft
Surface of the nucleus of Comet 67P from 10 km away as seen by Rosetta spacecraft
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 nucleus
…100 km), Comet of 1729 (≈100 km), Hale–Bopp (≈60 km), 29P (≈60 km), 109P/Swift–Tuttle (≈26 km), and 28P/Neujmin (≈21 km). The potato-shaped nucleus of Halley's Comet (15 × 8 × 8 km) contains equal amounts of ice and dust. During a flyby in September 2001, the Deep Space 1 spacecraft observed the nucleus of Comet…
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