Results 21 to 30 of about 2,093,430 (321)
The Planetary Science Journal, 2023 The tumultuous early era of outer solar system evolution culminated when Neptune migrated across the primordial Kuiper Belt (PKB) and triggered a dynamical instability among the giant planets.
William F. Bottke +8 more
doaj +1 more source
Could Solar Radiation Pressure Explain ‘Oumuamua’s Peculiar Acceleration? [PDF]
Astrophysical Journal, 2018 ‘Oumuamua (1I/2017 U1) is the first object of interstellar origin observed in the solar system. Recently, Micheli et al. reported that ‘Oumuamua showed deviations from a Keplerian orbit at a high statistical significance.
S. Bialy, A. Loeb
semanticscholar +1 more source
Survival of organic materials in hypervelocity impacts of ice on sand, ice, and water in the laboratory [PDF]
, 2014 Acknowledgments We thank STFC for support for the light gas gun at Kent. We wish to acknowledge the technical support provided by Colin Taylor in Aberdeen.
Bowden, Stephen A. +7 more
core +1 more source
Origins of Solar System Dust beyond Jupiter [PDF]
, 2002 The measurements of cosmic interplanetary dust by the instruments on board the Pioneer 10 and 11 spacecraft contain the dynamical signature of dust generated by Edgeworth-Kuiper belt objects, as well as short-period Oort cloud comets and short-period ...
M. Landgraf, J. Liou, H. Zook, E. Grün
semanticscholar +1 more source
COMETARY VOLATILES AND THE ORIGIN OF COMETS [PDF]
The Astrophysical Journal, 2012 We describe recent results on the CO/CO2/H2O composition of comets together with a survey of older literature (primarily for CO/H2O) and compare these with models of the protoplanetary disk. Even with the currently small sample, there is a wide dispersion in abundance ratios and little if any systematic difference between Jupiter-family comets (JFCs ...
A'Hearn, Michael F. +22 more
openaire +3 more sources
Origin, evolution and impact of electrons at comet 67P [PDF]
, 2022 The comet nucleus is a ball of ice and dust, heated through solar illumination. Near-surface ices sublimate under this heating and form the coma, an expanding envelope of neutral gas.
Stephenson, Peter
core +1 more source
Symposium - International Astronomical Union, 1972 The evolution of the solar system is surveyed, it being presumed that the Sun, Jupiter, and Saturn formed rather quickly and essentially with the composition of the original collapsing cloud of dust and gas. Just as the refractory material of the cloud is considered to have formed into planetesimals, from which the terrestrial planets collected, so is ...
openaire +1 more source
Thermal model of water and CO activity of Comet C/1995 O1 (Hale-Bopp)
, 2011 An investigation of the activity of Comet C/1995 O1 (Hale-Bopp) with a thermophysical nucleus model that does not rely on the existence of amorphous ice is presented.
H.U. Keller +8 more
core +1 more source
, 2013 Damage to DNA can block replication progression resulting in gaps in the newly synthesized DNA. Cells utilize a number of post-replication repair (PRR) mechanisms such as the RAD18 controlled translesion synthesis or template switching to overcome the ...
Himabindu Gali +14 more
core +1 more source
Activity and composition of the hyperactive comet 46P/Wirtanen during its close approach in 2018
, 2023 Hyperactive comets are a small group of comets whose activity are higher than expected. They seem to emit more water than they should based on the size of their nucleus and comet 46P/Wirtanen is one of them.
Shinnaka, Y. +30 more
core +1 more source