Results 21 to 30 of about 78,844 (253)
Organic Matter in Cometary Environments
Life, 2021 Comets contain primitive material leftover from the formation of the Solar System, making studies of their composition important for understanding the formation of volatile material in the early Solar System.
Adam J. McKay, Nathan X. Roth
doaj +1 more source
DUSTY PLASMA EFFECTS IN COMETS: EXPECTATIONS FOR ROSETTA
Reviews of Geophysics, 2013 D A Mendis
exaly +2 more sources
Possible Transfer of Life by Earth-Grazing Objects to Exoplanetary Systems
Life, 2020 Recently, a 30-cm object was discovered to graze the Earth’s atmosphere and shift into a Jupiter-crossing orbit. We use the related survey parameters to calibrate the total number of such objects.
Amir Siraj, Abraham Loeb
doaj +1 more source
Impacts drive lunar rockfalls over billions of years
Nature Communications, 2020 In this study, the authors present a global map of rockfalls on the lunar surface and determine impact events as short- and long-term driver for rockfall events.
Valentin Tertius Bickel +4 more
doaj +1 more source
CO and Other Volatiles in Distantly Active Comets [PDF]
, 2016 The activity of most comets near the Sun is dominated by the sublimation of frozen water, the most abundant ice in comets. Some comets, however, are active well beyond the water-ice sublimation limit of ∼3 au.
Maria Womack +4 more
semanticscholar +2 more sources
Origin and Evolution of Short-period Comets [PDF]
, 2017 Comets are icy objects that orbitally evolve from the trans-Neptunian region into the inner solar system, where they are heated by solar radiation and become active due to the sublimation of water ice.
D. Nesvorný +5 more
semanticscholar +1 more source
A Survey of Water Production in 61 Comets from SOHO/SWAN Observations of Hydrogen Lyman-alpha: Twenty-One Years 1996-2016. [PDF]
Icarus (New York, N.Y. 1962), 2018 The Solar Wind Anisotropies (SWAN) instrument on the SOlar and Heliospheric Observatory (SOHO) satellite has observed 44 long period and new Oort cloud comets and 36 apparitions of 17 short period comets since its launch in December 1995.
M. Combi +4 more
semanticscholar +1 more source
An Observational Upper Limit on the Interstellar Number Density of Asteroids and Comets [PDF]
, 2017 We derived 90% confidence limits (CLs) on the interstellar number density ( ) of interstellar objects (ISOs; comets and asteroids) as a function of the slope of their size–frequency distribution (SFD) and limiting absolute magnitude.
T. Engelhardt +6 more
semanticscholar +1 more source
General Relativistic Study of Motion of Comets Particles Elliptical Gravitational Field [PDF]
Physics AccessComets are small bodies consisting of aggregates of ice mixed with rock and dust. They are usually influenced by galactic forces and stellar encounters, and may have contributed to the formation of ice giants and transport gases across the solar system ...
Timothy Bulus +3 more
doaj +1 more source