Results 51 to 60 of about 26,344 (179)

Rotation Reduces Convective Mixing in Jupiter and Other Gas Giants

The Astrophysical Journal Letters, 2023
Recent measurements of Jupiter’s gravitational moments by the Juno spacecraft and seismology of Saturn’s rings suggest that the primordial composition gradients in the deep interior of these planets have persisted since their formation.
J. R. Fuentes, Evan H. Anders, Andrew Cumming, Bradley W. Hindman   +3 more
doaj   +1 more source

Core-Accretion Model Predicts Few Jovian-Mass Planets Orbiting Red Dwarfs

, 2004
The favored theoretical explanation for giant planet formation -- in both our solar system and others -- is the core accretion model (although it still has some serious difficulties). In this scenario, planetesimals accumulate to build up planetary cores,
Fred C. Adams, Gregory Laughlin, Hubickyj O., Peter Bodenheimer, Sozzetti A.   +4 more
core   +2 more sources

Stochasticity & Predictability in Terrestrial Planet Formation [PDF]

, 2016
Terrestrial planets are thought to be the result of a vast number of gravitational interactions and collisions between smaller bodies. We use numerical simulations to show that practically identical initial conditions result in a wide array of final ...
Grimm, Simon L., Hoffmann, Volker, Moore, Ben, Stadel, Joachim   +3 more
core   +2 more sources

Mapping the density of giant trees in the Amazon

New Phytologist, Volume 249, Issue 1, Page 152-168, January 2026.
Summary Tall trees (height ≥ 60 m) are keystone elements of tropical forests, strongly influencing biodiversity, carbon storage, and ecosystem resilience. Yet, their density and spatial distribution remain poorly quantified, especially in remote Amazonian regions, limiting our understanding of their ecological roles and contribution to forest–climate ...
Robson Borges de Lima, Diego Armando Silva da Silva, Matheus Henrique Nunes, Paulo R. de Lima Bittencourt, Peter Groenendyk, Cinthia Pereira de Oliveira, Daniela Granato‐Souza, Rinaldo L. Caraciolo Ferreira, José A. Aleixo da Silva, Jesús Aguirre‐Gutiérrez, Toby Jackson, João R. de Matos Filho, Perseu da Silva Aparício, Joselane P. Gomes da Silva, José Julio de Toledo, Marcelino Carneiro Guedes, Danilo R. Alves de Almeida, Niro Higuchi, Fabien H. Wagner, Jean Pierre Ometto, Eric Bastos Görgens   +20 more
wiley   +1 more source

Propagation and Transmission of Jupiter’s Internal Waves

The Astrophysical Journal
Observations from the Juno spacecraft show that Jupiter has a large dilute core rather than a compact core. To investigate the effects of different core structures on wave propagation and transmission in Jupiter’s interior, we consider three models: (1 ...
Yuru Xu, Xing Wei
doaj   +1 more source

Formation of '3D' multiplanet systems by dynamical disruption of multiple-resonance configurations [PDF]

, 2011
Assuming that giant planets are formed in thin protoplanetary discs, a '3D' system can form, provided that the mutual inclination is excited by some dynamical mechanism.
A.-S. Libert, Adams, Beaugé, Beaugé, Butler, Chatterjee, Cochran, Fabrycky, Ford, Ford, Ford, Jurić, K. Tsiganis, Kozai, Libert, Libert, Libert, Libert, Libert, Marois, Marzari, Matsumura, McArthur, Michtchenko, Moorhead, Morbidelli, Morbidelli, Nagasawa, Rivera, Thommes, Thommes   +30 more
core   +2 more sources

Uranus' Long‐Term Thermospheric Cooling Is Unlikely to Be Primarily Driven by the Solar Wind

Geophysical Research Letters, Volume 52, Issue 24, 28 December 2025.
Abstract Over the last 40 yrs, Uranus' thermospheric temperature has decreased by ∼8 K/yr. Here we show that this is less likely to be driven by solar wind kinetic power than previously thought. We determine that the solar wind kinetic power at Uranus has been increasing since the start of solar cycle 24 in 2009, while Uranus's thermospheric ...
Jamie M. Jasinski, Henrik Melin, James A. Sinclair, Sophia Zomerdijk‐Russell, Nick Achilleos, Carol Paty   +5 more
wiley   +1 more source

A Pan-STARRS1 Search for Planet Nine

The Astronomical Journal
We present a search for Planet Nine using the second data release of the Pan-STARRS1 survey. We rule out the existence of a Planet Nine with the characteristics of that predicted in Brown & Batygin to a 50% completion depth of V = 21.5.
Michael E. Brown, Matthew J. Holman, Konstantin Batygin   +2 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

The Invisible Majority? Evolution and Detection of Outer Planetary Systems without Gas Giants [PDF]

, 2010
We present 230 realizations of a numerical model of planet formation in systems without gas giants. These represent a scenario in which protoplanets grow in a region of a circumstellar disk where water ice condenses (the "ice line''), but fail to accrete
Gaidos, Eric, Gaudi, B. Scott, Mann, Andrew W.   +2 more
core   +3 more sources