Results 91 to 100 of about 10,220 (206)

Formation of Asteroid (16) Psyche by a Giant Impact

Journal of Geophysical Research: Planets, Volume 131, Issue 1, January 2026.
Abstract Asteroid (16) Psyche is the largest likely metal‐rich asteroid in the Solar System and the target of the NASA Psyche mission. The mission aims to determine whether the asteroid is the core of a differentiated planetesimal that lost its mantle via a giant impact.
Saverio Cambioni, Benjamin P. Weiss, Namya Baijal, Robert Melikyan, Erik Asphaug, John B. Biersteker, Richard P. Binzel, William F. Bottke, Samuel W. Courville, Linda T. Elkins‐Tanton, David J. Lawrence, José M. G. Merayo, Carol A. Raymond, Mark A. Wieczorek, Maria T. Zuber   +14 more
wiley   +1 more source

Cation Disorder of Mg2SiO4 ${\text{Mg}}_{\mathbf{2}}{\text{SiO}}_{\mathbf{4}}$ in Super‐Earth Mantles

Geophysical Research Letters, Volume 52, Issue 24, 28 December 2025.
Abstract Understanding the mineralogy of exoplanets is essential for unraveling their interior structures, dynamics, and evolution. For large super‐Earths, the post‐post spinel Mg2SiO4 ${\text{Mg}}_{2}{\text{SiO}}_{4}$, one of the major mantle phases, may undergo the order‐disorder transition (ODT) at high temperatures.
Donghao Zheng, Yifan Li, Yihang Peng, Rushi Gong, Zi‐Kui Liu, Jie Deng   +5 more
wiley   +1 more source

Exoplanets: Possible Biosignatures

, 2017
The ancestor philosophers' dream of thousands of new worlds is finally realised: about 3500 extrasolar planets have been discovered in the neighborhood of our Sun. Most of them are very different from those we used to know in our Solar System.
Claudi, R.
core   +1 more source

EXODUS: A mission to explore exoplanet evolution through understanding atmospheric escape

EXODUS is a proposed mission to study the largely unexplored range of sub-Neptune to Jupiter-sized exoplanets with orbital periods longer than 100 days. The focus of the mission lies in the detection of these planets and characterisation of atmospheric escape to constrain their evolutionary pathways.
Citlali Bruce Rosete, Mireia Leon Dasi, Marius Anger, Paula Benitez Sesmilo, Mark R. Boyd, Frederik Dall'Omo, Simone Filomeno, Jan-Vincent Harre, Kim Angelique Kahle, Isabel Pitz, Vito Saggese   +10 more
openaire   +1 more source

UV transit observations of EUV-heated expanded thermospheres of Earth-like exoplanets around M-stars: testing atmosphere evolution scenarios

Astrophysics and Space Science, 2011
The detection and investigation of EUV heated, extended and non-hydrostatic upper atmospheres around terrestrial exoplanets would provide important insights into the interaction of the host stars plasma environment as well as the evolution of Earth-type planets their atmospheres and possible magnetic environments.
Lammer, H., Eybl, Vera Theresa, Kislyakova, K. G., Weingrill, J., Holmstrom, M., Khodachenko, M. L., Kulikov, Yu N., Reiners, Ansgar, Leitzinger, M., Odert, P., Gruess, M. Xiang, Dorner, B. G., Guedel, M., Hanslmeier, A.   +13 more
openaire   +2 more sources

Altitude Profile and Isotopic Composition for N2 From Pioneer Venus Mass Spectra

Geophysical Research Letters, Volume 52, Issue 23, 16 December 2025.
Abstract We report the highest resolution altitude profile and isotopic composition for N2 at Venus, to date. These results were obtained through re‐analysis of data acquired by the Pioneer Venus Large Probe Neutral Mass Spectrometer (LNMS). The N2 is non‐uniformly mixed across the clouds and sub‐cloud atmosphere (∼59–15 km) yet uniformly mixed across ...
R. Mogul, S. S. Limaye, M. J. Way
wiley   +1 more source

A Multispecies Atmospheric Escape Model with Excited Hydrogen and Helium: Application to HD209458b

The Astrophysical Journal
Atmospheric escape shapes exoplanet evolution and star–planet interactions, with He I 10830 Å absorption serving as a key tracer of mass loss in hot gas giants.
Anna Ruth Taylor, Tommi T. Koskinen, Luca Argenti, Nicholas Lewis, Chenliang Huang, Anthony Arfaux, Panayotis Lavvas   +6 more
doaj   +1 more source

Observing transiting planets with JWST -- Prime targets and their synthetic spectral observations

, 2016
The James Webb Space Telescope will enable astronomers to obtain exoplanet spectra of unprecedented precision. Especially the MIRI instrument may shed light on the nature of the cloud particles obscuring planetary transmission spectra in the optical and ...
Bouwman, Jeroen, Henning, Thomas, Lagage, Pierre-Olivier, Min, Michiel, Mollière, Paul, van Boekel, Roy   +5 more
core   +1 more source

Helium in the Extended Atmosphere of the Warm Superpuff TOI-1420b

The Astronomical Journal
Superpuffs are planets with exceptionally low densities ( ρ ≲ 0.1 g cm ^−3 ) and core masses ( M _c ≲ 5 M _⊕ ). Many lower-mass ( M _p ≲ 10 M _⊕ ) superpuffs are expected to be unstable to catastrophic mass loss via photoevaporation and/or boil-off ...
Shreyas Vissapragada, Michael Greklek-McKeon, Dion Linssen, Morgan MacLeod, Daniel P. Thorngren, Peter Gao, Heather A. Knutson, David W. Latham, Mercedes López-Morales, Antonija Oklopčić, Jorge Pérez González, Morgan Saidel, Abigail Tumborang, Stephanie Yoshida   +13 more
doaj   +1 more source

Stellar magnetic activity and Star-Planet Interactions (invited review)

, 2014
Stellar magnetic activity is an important factor in the formation and evolution of exoplanets. Magnetic phenomena like stellar flares, coronal mass ejections, and high-energy emission affect the exoplanetary atmosphere and its mass loss over time.
Poppenhaeger, K.
core   +2 more sources