Results 1 to 10 of about 2,467 (161)
Breakup of a long-period comet as the origin of the dinosaur extinction [PDF]
Scientific Reports, 2021 The origin of the Chicxulub impactor, which is attributed as the cause of the K/T mass extinction event, is an unsolved puzzle. The background impact rates of main-belt asteroids and long-period comets have been previously dismissed as being too low to ...
Amir Siraj, Abraham Loeb
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The Evolution of Long-Period Comets [PDF]
Icarus, 1999 We study the evolution of long-period comets by numerical integration of their orbits, following comets from their origin in the Oort cloud until their final escape or destruction, in a model solar system consisting of the Sun, the four giant planets and the Galactic tide.
Scott Tremaine, Paul Wiegert
exaly +3 more sources
The end states of long-period comets and the origin of Halley-type comets [PDF]
Monthly Notices of the Royal Astronomical Society, 2016 34 pages, 17 figures, article in ...
Tabare Gallardo +2 more
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The Demographics of Long‐Period Comets [PDF]
Astrophysical Journal, 2005 Accepted for publication in Astrophysical Journal.
exaly +4 more sources
Early long-period comets: their discovery and flux [PDF]
Monthly Notices of the Royal Astronomical Society, 2003 By analysing recent comet catalogues, it is found that the flux of long-period comets to the inner solar system has been reasonably constant throughout the last two millennia. There is no evidence of periods of enhanced activity, or comet showers. The acuity of northern hemisphere naked-eye observers throughout the era of pre-telescopic astronomy was ...
Hughes David W
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The activity characteristics and mechanisms of long-period comets
Earth and Planetary PhysicsComets are small celestial bodies orbiting around the Sun. They are remnants left over from the formation of the solar system; their interiors store original material of the planetary disk within the solar system. They are thus "fossils" for studying the
YingQi Wu +3 more
doaj +2 more sources
Long-period comets with non-gravitational effects [PDF]
Astronomy and Astrophysics, 2004 Summary: The influence of non-gravitational effects on the motion of long-period comets is analyzed. Investigations were performed for about 60 nearly-parabolic comets discovered during the last thirty years. All three non-gravitational parameters \(A_1, A_2, A_3\) were detected in the motion of 19 comets on the basis of positional observations only ...
M Królikowska
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Water production activity of nine long-period comets from SOHO/SWAN observations of hydrogen Lyman-alpha: 2013–2016 [PDF]
Icarus, 2018 Eric Quemerais +2 more
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CO and CO2 Productions Rates of Comets Observed by NEOWISE within Year 1 of the Reactivated Mission
The Planetary Science Journal, 2023 We report on the observed fluxes of the comets detected by NEOWISE during the first year of operations after the spacecraft’s reactivation. The sample included 57 comets.
Adeline Gicquel +4 more
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Origin and Evolution of Long-period Comets [PDF]
The Astronomical Journal, 2019 Abstract We develop an evolutionary model of the long-period comet (LPC) population, starting from their birthplace in a massive trans-Neptunian disk that was dispersed by migrating giant planets. Most comets that remain bound to the solar system are stored in the Oort cloud.
David Vokrouhlický +2 more
openaire +2 more sources