Results 21 to 30 of about 483,921 (367)

Warm terrestrial planet with half the mass of Venus transiting a nearby star [PDF]

, 2021
In recent years, the advent of a new generation of radial velocity instruments has allowed us to detect planets with increasingly lower mass and to break the one Earth-mass barrier.
O. Demangeon, M. Z. Osorio, Y. Alibert, S. Barros, V. Adibekyan, H. Tabernero, A. Antoniadis-Karnavas, J. D. Camacho, A. Mascareno, M. Oshagh, G. Micela, S. Sousa, C. Lovis, F. Pepe, R. Rebolo, S. Cristiani, N. Santos, R. Allart, C. Prieto, D. Bossini, F. Bouchy, A. Cabral, M. Damasso, P. Marcantonio, V. D’Odorico, D. Ehrenreich, J. Faria, P. Figueira, R. G. Santos, J. Haldemann, N. Hara, J. Hern'andez, B. Lavie, J. Lillo-Box, G. Curto, C. Martins, D. M'egevand, A. Mehner, P. Molaro, N. Nunes, E. Pall'e, L. Pasquini, E. Poretti, A. Sozzetti, S. Udry   +44 more
semanticscholar   +1 more source

Lunar and terrestrial planet formation in the Grand Tack scenario. [PDF]

Philos Trans A Math Phys Eng Sci, 2014
We present conclusions from a large number of N-body simulations of the giant impact phase of terrestrial planet formation. We focus on new results obtained from the recently proposed Grand Tack model, which couples the gas-driven migration of giant ...
Jacobson SA, Morbidelli A.
europepmc   +3 more sources

A terrestrial planet candidate in a temperate orbit around Proxima Centauri [PDF]

Nature, 2016
At a distance of 1.295 parsecs, the red dwarf Proxima Centauri (α Centauri C, GL 551, HIP 70890 or simply Proxima) is the Sun’s closest stellar neighbour and one of the best-studied low-mass stars.
G. Anglada-Escudé, P. J. Amado, J. Barnes, Z. Berdiñas, R. P. Butler, G. Coleman, I. de la Cueva, S. Dreizler, M. Endl, B. Giesers, S. Jeffers, James S. Jenkins, H. Jones, M. Kiraga, M. Kürster, M. López-González, C. Marvin, N. Morales, J. Morin, Richard P. Nelson, J. L. Ortiz, A. Ofir, S. Paardekooper, A. Reiners, E. Rodríguez, Cristina Rodrίguez-López, L. Sarmiento, J. Strachan, Y. Tsapras, M. Tuomi, M. Zechmeister   +30 more
semanticscholar   +1 more source

The Role of Early Giant-planet Instability in Terrestrial Planet Formation [PDF]

, 2020
The terrestrial planets are believed to have formed by violent collisions of tens of lunar- to Mars-size protoplanets at time t < 200 Myr after the protoplanetary gas disk dispersal (t 0).
D. Nesvorný, F. Roig, R. Deienno
semanticscholar   +1 more source

Building Terrestrial Planets [PDF]

Annual Review of Earth and Planetary Sciences, 2012
This article reviews our current understanding of terrestrial planet formation. The focus is on computer simulations of the dynamical aspects of the accretion process. Throughout the review, we combine the results of these theoretical models with geochemical, cosmochemical, and chronological constraints to outline a comprehensive scenario of the early
Morbidelli, A., Lunine, J.I., O'Brien, D. P., Raymond, Sean N., Walsh, K. J.   +4 more
openaire   +5 more sources

GJ 357 d: Potentially Habitable World or Agent of Chaos?

The Astronomical Journal, 2023
Multiplanet systems provide important laboratories for exploring dynamical interactions within the range of known exoplanetary system architectures. One such system is GJ 357, consisting of a low-mass host star and three orbiting planets, the outermost ...
Stephen R. Kane, Tara Fetherolf
doaj   +1 more source

The Kinetic Monte Carlo Model of the Auroral Electron Precipitation into N₂-O₂ Planetary Atmospheres

Universe, 2022
Auroral events are the prominent manifestation of solar/stellar forcing on planetary atmospheres. They are closely related to the energy deposition by and evolution of planetary atmospheres, and their observations are widely used to analyze the ...
Dmitri Bisikalo, Valery Shematovich, Benoit Hubert   +2 more
doaj   +1 more source

Mercury’s Hidden Past: Revealing a Volatile-dominated Layer through Glacier-like Features and Chaotic Terrains

The Planetary Science Journal, 2023
The discovery of global elemental volatile compositions, sublimation hollows, and chaotic terrains has significantly reshaped our understanding of Mercury’s geology.
J. Alexis P. Rodriguez, Deborah Domingue, Bryan Travis, Jeffrey S. Kargel, Oleg Abramov, Mario Zarroca, Maria E. Banks, John Weirich, Anthony Lopez, Nicholas Castle, Yan Jianguo, Frank Chuang   +11 more
doaj   +1 more source

Three Red Suns in the Sky: A Transiting, Terrestrial Planet in a Triple M-dwarf System at 6.9 pc [PDF]

Astronomical Journal, 2019
We present the discovery from Transiting Exoplanet Survey Satellite (TESS) data of LTT 1445Ab. At a distance of 6.9 pc, it is the second nearest transiting exoplanet system found to date, and the closest one known for which the primary is an M dwarf. The
J. Winters, A. Medina, J. Irwin, D. Charbonneau, N. Astudillo-Defru, E. Horch, J. Eastman, E. Vrijmoet, T. Henry, H. Diamond-Lowe, E. Winston, T. Barclay, X. Bonfils, G. Ricker, R. Vanderspek, D. Latham, S. Seager, J. Winn, J. Jenkins, S. Udry, J. Twicken, J. Teske, P. Tenenbaum, F. Pepe, F. Murgas, P. Muirhead, J. Mink, C. Lovis, A. Levine, S. L'epine, W. Jao, C. Henze, G. Fur'esz, T. Forveille, P. Figueira, G. Esquerdo, C. Dressing, R. D'iaz, X. Delfosse, C. Burke, F. Bouchy, P. Berlind, J. Almenara   +42 more
semanticscholar   +1 more source

Extreme Debris Disk Variability: Exploring the Diverse Outcomes of Large Asteroid Impacts During the Era of Terrestrial Planet Formation [PDF]

Astronomical Journal, 2019
The most dramatic phases of terrestrial planet formation are thought to be oligarchic and chaotic growth, on timescales of up to 100–200 Myr, when violent impacts occur between large planetesimals of sizes up to protoplanets.
K. Su, Alan P. Jackson, Alan P. Jackson, A. Gáspár, G. Rieke, Ruobing Dong, Ruobing Dong, J. Olofsson, Grant M. Kennedy, Z. Leinhardt, R. Malhotra, M. Hammer, H. Meng, W. Rujopakarn, W. Rujopakarn, W. Rujopakarn, Joseph E. Rodriguez, J. Pepper, D. Reichart, D. James, K. Stassun, K. Stassun   +21 more
semanticscholar   +1 more source