Results 61 to 70 of about 1,415 (183)

Formation of our solar system's giant planets via pebble accretion

, 2021
The classical core accretion model of gas giant formation requires the formation of a solid core of around 10 $M_\oplus$ to trigger runaway gas accretion, but the growth timescale by pairwise accretion of planetesimals to reach the critical core mass ...
Lau, Tommy Chi Ho, 劉智昊
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Past Field Experiments of Solar Radiation Modification: A Review of the Scientific and Technical Aspects for Governance

Earth's Future, Volume 14, Issue 5, May 2026.
Abstract As global warming intensifies, Solar Radiation Modification (SRM) has drawn increasing scientific and policy interest as a potential means to temporarily offset climate impacts. This review examines past SRM (or SRM‐like) field experiments, categorized into three primary techniques: Tropospheric and Stratospheric Aerosol Injection (SAI ...
I. Hernandez‐Galindo, A. Määttänen, B. H. Redmond Roche, O. Boucher, P. J. Irvine, J. C. Moore   +5 more
wiley   +1 more source

General circulation modelling of close-in extrasolar giant planets

, 2011
PhDA large fraction of the extrasolar planets detected so far are giant planets that have such short orbital periods (a few days) that they are thought to be tidally-synchronised with the host star. Such orbits lead to permanent day/night sides on the
Thrastarson, Heidar Thor
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Atmospheres of brown dwarfs

, 2014
ChH highlights financial support of the European Community under the FP7 by an ERC starting grant. SLC acknowledges financial support of University of LeicesterBrown Dwarfs are the coolest class of stellar objects known to date. Our present perception is
Casewell, Sarah, Helling, Christiane
core   +1 more source

Temperatures of Jupiter’s Upper Atmosphere: The Role of the Planetary Magnetic Field

The Astrophysical Journal Letters
The primary source of heating in the upper atmospheres (thermospheres) of giant planets has been the subject of long debate. The conundrum (or “energy crisis”) consists in observed thermosphere temperatures at low and midlatitudes exceeding values ...
Ingo C. F. Müller-Wodarg, Peio Iñurrigarro, Luke Moore, Tommi T. Koskinen, Alexander S. Medvedev   +4 more
doaj   +1 more source

Soft X‐Ray Emission From Saturn's Magnetosheath II: Solar Wind Driving

Journal of Geophysical Research: Space Physics, Volume 131, Issue 5, May 2026.
Abstract Saturn's magnetosphere is dominated by Enceladus‐sourced neutrals, which spread throughout the system into the magnetosheath. The neutrals can charge exchange with highly charged solar wind ions, causing soft X‐ray emission (<2 ${< } 2$ keV) upon de‐excitation of the ion.
D. Naylor, L. C. Ray, P. C. Rogan, W. R. Dunn, H. T. Smith   +4 more
wiley   +1 more source

From planetesimals to planets: volatile molecules

, 2014
Context. Solar and extrasolar planets are the subject of numerous studies aiming to determine their chemical composition and internal structure. In the case of extrasolar planets, the composition is important as it partly governs their potential ...
Amaury Thiabaud, Cabral, N., Alibert, Yann, Nahuel Cabral, Alibert, Y., Ulysse Marboeuf, Benz, Willy, Willy Benz, Cabral, Nahuel, Thiabaud, Amaury, Marboeuf, Ulysse, Marboeuf, U., Thiabaud, A., Yann Alibert, Benz, W.   +14 more
core   +1 more source

The Linear Mixing Approximation in Silica–Water Mixtures at Planetary Conditions

The Astrophysical Journal
The linear mixing approximation (LMA) is often used in planetary models for calculating the equations of state (EOS) of mixtures. A commonly assumed planetary composition is a mixture of rock and water. Here we assess the accuracy of the LMA for pressure–
Valiantsin Darafeyeu, Stephanie Rimle, Guglielmo Mazzola, Ravit Helled   +3 more
doaj   +1 more source

Shallow Impact Craters Suggest Titan Stores Methane in an Insulating Clathrate Crust

Journal of Geophysical Research: Planets, Volume 131, Issue 5, May 2026.
Abstract Multiple lines of evidence suggest that a methane‐clathrate crustal layer exists in Titan. However, we have not directly confirmed the existence or thickness of this hypothesized layer, a potentially important methane reservoir. Here, we model impact crater formation and subsequent viscoelastic evolution in Titan's ice shell with methane ...
L. R. Schurmeier, S. Wakita, G. E. Brouwer, J. M. Soderblom, B. C. Johnson, C. D. Neish, J. K. Steckloff, J. P. Kolpin   +7 more
wiley   +1 more source

Giant planets: Clues on current and past organic chemistry in the outer solar system

, 1992
The giant planets of the outer solar system - Jupiter, Saturn, Uranus, and Neptune - were formed in the same flattened disk of gas and dust, the solar nebula, as the terrestrial planets were.
Atreya, Sushil K., Pollack, James B.
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