Results 91 to 100 of about 20,660,199 (171)

Thermal Emission and Confirmation of the Frigid White Dwarf Exoplanet WD 1856+534 b

open access: yesThe Astrophysical Journal Letters
We report the detection of thermal emission from and confirm the planetary nature of WD 1856+534 b, the first transiting planet known to orbit a white dwarf (WD) star.
Mary Anne Limbach   +14 more
doaj   +1 more source

The JWST Weather Report from the Isolated Exoplanet Analog SIMP 0136+0933: Pressure-dependent Variability Driven by Multiple Mechanisms

open access: yesThe Astrophysical Journal Letters
Isolated planetary-mass objects share their mass range with planets but do not orbit a star. They lack the necessary mass to support fusion in their cores and thermally radiate their heat from formation as they cool, primarily at infrared wavelengths ...
Allison M. McCarthy   +19 more
doaj   +1 more source

Excitation and Damping of Oscillation Modes in Gaseous Planets

open access: yesThe Planetary Science Journal
The excitation and damping mechanisms for oscillation modes of gas giant planets are undetermined. We show that differential rotation may greatly enhance the convective viscosity in giant planets, resulting in damping times of t _damp  ∼ 10 ^5 –10 ^6 yr ...
Jim Fuller   +4 more
doaj   +1 more source

The Nine Planets: A Multimedia Tour of the Solar System

open access: yes, 2008
Created by Bill Arnett, "The Nine Planets" is an overview of the history, mythology, and current scientific knowledge of each of the planets, moons, and some other objects in our solar system.
Arnett, Bill
core  

Microlensing for extrasolar planets : improving the photometry [PDF]

open access: yes, 2013
Gravitational Microlensing, as a technique for detecting Extrasolar Planets, is recognised for its potential in discovering small-mass planets similar to Earth, at a distance of a few Astronomical Units from their host stars.
Bajek, David J.
core  

Jupiter Evolutionary Models Incorporating Stably Stratified Regions

open access: yesThe Astrophysical Journal
We address the issue of which broad set of initial conditions for the planet Jupiter best matches the current presence of a “fuzzy core” of heavy elements, while at the same time comporting with measured parameters such as its effective temperature ...
Roberto Tejada Arevalo   +3 more
doaj   +1 more source

Microwave Remote Sensing of Giant Planet Atmospheres: Considerations for Saturn and Uranus Orbiter Missions

open access: yesThe Planetary Science Journal
Microwave radiometer instruments are uniquely capable of studying volatile element abundances and heat/mass transport within the deep atmospheres of giant planets.
Alex B. Akins, Mark D. Hofstadter
doaj   +1 more source

Formation and Evolution Simulations of Saturn, Including Composition Gradients and Helium Immiscibility

open access: yesThe Planetary Science Journal
In this paper, the formation of Saturn is modeled by detailed numerical simulations according to the core-nucleated accretion scenario. Previous models are enhanced to include the dissolution of accreting planetesimals, composed of water ice, rock, and ...
Peter Bodenheimer   +3 more
doaj   +1 more source

Interactions of migrating giant planets and small solar-system bodies

open access: yes, 2017
Changes of semimajor axes of giant planets, which took place 4 billion years ago and evolved the Solar System towards its present state, affected various populations of minor Solar-System bodies. One of these populations was a group of dynamically stable
Chrenko, Ondřej
core  

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