Results 51 to 60 of about 19,604,258 (169)

A Physics‐Based Frequency‐Temperature Seismic Anelastic Attenuation Model for Planetary Ice Shells

Earth and Space Science, Volume 13, Issue 8, August 2026.
Abstract Intrinsic attenuation in planetary ices remains poorly constrained at seismic frequencies and low temperatures, limiting quantitative predictions of wave propagation in icy moons. Existing models typically rely on constant‐Q, or power‐law formulations that lack microphysical grounding and fail to capture the strong temperature sensitivity of ...
L. Delaroque, A. Lucas, T. Kawamura, S. Rodriguez   +3 more
wiley   +1 more source

The Mcdonald Observatory Planet Search: New Long-Period Giant Planets And Two Interacting Jupiters In The HD 155358 System [PDF]

, 2012
We present high-precision radial velocity (RV) observations of four solar-type (F7-G5) stars-HD 79498, HD 155358, HD 197037, and HD 220773-taken as part of the McDonald Observatory Planet Search Program.
Endl, Michael, Simon, Attila E., Horner, J., Caldwell, Caroline, Robertson, Paul, Barnes, Stuart I., Cochran, William D., MacQueen, Phillip J., Brugamyer, Erik J., Wittenmyer, Robert A., Horner, Jonathan   +10 more
core   +1 more source

Dust Recycling and Icy Volatile Enhancement (DRIVE): A Novel Method of Volatile Enrichment in Cold Giant Planets

The Astrophysical Journal Letters
Giant planet atmospheres are thought to reflect the gas phase composition of the disk when and where they formed. However, these atmospheres may also be polluted via solid accretion or ice sublimation in the disk.
Eric R. Van Clepper, Felipe Alarcón, Edwin Bergin, Fred J. Ciesla   +3 more
doaj   +1 more source

Origin and early evolution of terrestrial planet atmospheres and oceans

Terrestrial, Atmospheric and Oceanic Sciences, 2019
Planet atmospheric compositions are determined by the availability of a gas species, its molecular weight and the mass (or gravity force) of a planet. Both Mercury and the Moon are not massive enough to hold any gas species to form an atmosphere.
Lin-gun Liu
doaj   +1 more source

Highly Asymmetric Magnetosphere‐Ionosphere‐Thermosphere Coupling at Uranus

Journal of Geophysical Research: Space Physics, Volume 131, Issue 8, August 2026.
Abstract Magnetosphere‐Ionosphere‐Thermosphere (MIT) coupling is widely considered the dominant energy source responsible for maintaining the elevated thermospheric temperatures observed at the giant planets. At Uranus, the strongly tilted and asymmetric magnetic field produces a highly asymmetric magnetospheric configuration that may fundamentally ...
M. Acevski, N. Achilleos, A. Masters, C. Smith, P. I. Tiranti   +4 more
wiley   +1 more source

SOLAR PIONEERS: The Frontier Entrepreneurialism of a Sluggish Energy Transition

Cultural Anthropology, Volume 41, Issue 3, Page 692-717, August 2026.
ABSTRACT Scholars, activists, and politicians attempt to provoke urgent climate action by christening 2050 as the decisive date by which the United States must transition from fossil fuels. But I contend that calendrical teleologies do not actually motivate the everyday people, activists, and workers leading the U.S. energy transition.
MYLES LENNON
wiley   +1 more source

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

, 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.
core  

Fingerprints of giant planets in the composition of solar twins [PDF]

, 2020
The Sun shows a ∼10 per cent depletion in refractory elements relative to nearby solar twins. It has been suggested that this depletion is a signpost of planet formation.
Owen, James E, Owen, J.E., Booth, R.A., Booth, Richard A   +3 more
core   +1 more source

Insights Into Magmatic Degassing, Hydrothermal Dynamics, and Eruption Precursors From Long Term SO2 Emission Monitoring at Whakaari/White Island, New Zealand

Geophysical Research Letters, Volume 53, Issue 14, 28 July 2026.
Abstract Long‐term SO2 emission rate time series are critical for deciphering the subsurface processes regulating open‐vent volcanoes, yet extracting cyclical drivers from continuous degassing records remains challenging. We analyze a 14‐year (2006–2020) SO2 emission rate data set from Whakaari/White Island, New Zealand, identifying five chronological ...
A. Mazot, C. Miller, K. Britten, B. Scott, G. Kilgour, Cynthia Werner   +5 more
wiley   +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