Results 171 to 180 of about 2,093,691 (201)
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Surveys in Geophysics, 1997
Since the periodicity of comets was first established by Halley, the question of their origin has fascinated astronomers. It is clear that they have to be stored somewhere, since their life time in the inner Solar System is short. Around 1950 the idea emerged that cometary nuclei could be stored in a belt beyond Neptune, and this belt became known as ...
I. P. Williams, S. J. Collander-Brown
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Since the periodicity of comets was first established by Halley, the question of their origin has fascinated astronomers. It is clear that they have to be stored somewhere, since their life time in the inner Solar System is short. Around 1950 the idea emerged that cometary nuclei could be stored in a belt beyond Neptune, and this belt became known as ...
I. P. Williams, S. J. Collander-Brown
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2003
The presence, the physical and dynamical properties, the chemical composition and the possible origin of Trans Neptunians small bodies are reviewd. The enrichment of dust by collisions among TNOs in the Kuiper Belt is also discussed.
Maria Antonietta Barucci, Jennifer Romon
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The presence, the physical and dynamical properties, the chemical composition and the possible origin of Trans Neptunians small bodies are reviewd. The enrichment of dust by collisions among TNOs in the Kuiper Belt is also discussed.
Maria Antonietta Barucci, Jennifer Romon
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Unusual Eccentricity and Inclination Distributions of Trans-Neptunian Objects and Trans-Neptunian Binaries [PDF]
International Journal of Astrophysics and Space Science, 2018 The eccentricity and inclination of trans-Neptunian objects (TNOs) decrease significantly as radius of perihelion increases. Also, the percentage of TNOs in almost circular orbits with low inclinations increases dramatically with perihelion distance.
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HST Photometry of trans-Neptunian Objects
Earth, Moon, and Planets, 2003From July 2001 to June 2002, an HST snapshot program obtained V, R and I photometry for 72 TNOs. The TNOs were sorted by dynamical class, and Spearman rank correlation statistics were calculated for each combination of color and orbital parameter. No strong correlations were found for the combined sample of TNOs, the resonant TNOs, or the non-resonant ...
D. C. Stephens +8 more
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2016
For a very long period of time our solar system was believed to comprise nine planets: the terrestrial planets Mercury, Venus, Earth, Mars, followed by the gas giants Jupiter, Saturn, Uranus and Neptune. The exotic and tiny Pluto brought up the rear. Pluto was demoted from its planet status in 2006. Thus, only eight planets remain.
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For a very long period of time our solar system was believed to comprise nine planets: the terrestrial planets Mercury, Venus, Earth, Mars, followed by the gas giants Jupiter, Saturn, Uranus and Neptune. The exotic and tiny Pluto brought up the rear. Pluto was demoted from its planet status in 2006. Thus, only eight planets remain.
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Contamination of the asteroid belt by primordial trans-Neptunian objects
Nature, 2009The main asteroid belt, which inhabits a relatively narrow annulus approximately 2.1-3.3 au from the Sun, contains a surprising diversity of objects ranging from primitive ice-rock mixtures to igneous rocks. The standard model used to explain this assumes that most asteroids formed in situ from a primordial disk that experienced radical chemical ...
Levison, H.F. +5 more
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The trans-neptunian object UB313 is larger than Pluto
Nature, 2006The most distant known object in the Solar System, 2003 UB313 (97 au from the Sun), was recently discovered near its aphelion. Its high eccentricity and inclination to the ecliptic plane, along with its perihelion near the orbit of Neptune, identify it as a member of the 'scattered disk'.
F, Bertoldi +4 more
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Pluto: A Planet or a Trans-Neptunian Object?
Highlights of Astronomy, 2002AbstractThe purposes of classification and taxonomy are reviewed. Using examples from fields ranging from paleontology to planetology, I argue that non-exclusive classifications, which allow Pluto to be considered both a planet and a TNO, provide the most desirable approach to progress in our science.
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