Results 61 to 70 of about 22,266,209 (231)

The Demographics of Terrestrial Planets in the Venus Zone

The Astronomical Journal, 2023
Understanding the physical characteristics of Venus, including its atmosphere, interior, and its evolutionary pathway with respect to Earth, remains a vital component for terrestrial planet evolution models and the emergence and/or decline of planetary ...
Colby Ostberg, Stephen R. Kane, Zhexing Li, Edward W. Schwieterman, Michelle L. Hill, Kimberly Bott, Paul A. Dalba, Tara Fetherolf, James W. Head, Cayman T. Unterborn   +9 more
doaj   +1 more source

Spin-orbit measurements and refined parameters for the exoplanet systems WASP-22 and WASP-26 [PDF]

, 2011
We report on spectroscopic and photometric observations through transits of the exoplanets WASP-22b and WASP-26b, intended to determine the systems’ spin-orbit angles. We combine these data with existing data to refine the system parameters.
D. Anderson, A. Cameron, M. Gillon, C. Hellier, E. Jehin, M. Lendl, D. Queloz, B. Smalley, A. Triaud, M. Vanhuysse   +9 more
semanticscholar   +1 more source

Solar System Planets and Exoplanets

, 2021
Solar System planets have been studied for centuries, but the observation of exoplanets is only a few decades old. Consequently, knowledge of exoplanets is considerably more limited than Solar System planets. This chapter reviews the essential characteristics of Solar System planets and associated data derived from a variety of observational approaches.
openaire   +4 more sources

Exoplanet secondary atmosphere loss and revival [PDF]

Proceedings of the National Academy of Sciences of the United States of America, 2020
Significance Earth and Venus have significant atmospheres, but Mercury does not. Thousands of exoplanets are known, but we know almost nothing about rocky exoplanet atmospheres. Many rocky exoplanets were formed by a sub-Neptune-to-super-Earth conversion
E. Kite, M. Barnett
semanticscholar   +1 more source

The K2 and TESS Synergy. II. Revisiting 26 Systems in the TESS Primary Mission

The Astronomical Journal, 2023
The legacy of NASA’s K2 mission has provided hundreds of transiting exoplanets that can be revisited by new and future facilities for further characterization, with a particular focus on studying the atmospheres of these systems. However, the majority of
Erica Thygesen, Jessica A. Ranshaw, Joseph E. Rodriguez, Andrew Vanderburg, Samuel N. Quinn, Jason D. Eastman, Allyson Bieryla, David W. Latham, Roland K. Vanderspek, Jon M. Jenkins, Douglas A. Caldwell, Mma Ikwut-Ukwa, Knicole D. Colón, Jessie Dotson, Christina Hedges, Karen A. Collins, Michael L. Calkins, Perry Berlind, Gilbert A. Esquerdo   +18 more
doaj   +1 more source

Exoplanet orbital eccentricity: Multiplicity relation and the Solar System [PDF]

Proceedings of the National Academy of Sciences, 2014
Significance The Solar System planets have near-circular orbits (i.e., unusually low eccentricity) compared with the known population of exoplanets, planets that orbit stars other than the Sun. This fact has been widely interpreted to indicate that the Solar System is an atypical member of the overall population of planetary systems.
Mary Anne Limbach, Edwin L. Turner
openaire   +3 more sources

The NASA Exoplanet Archive and Exoplanet Follow-up Observing Program: Data, Tools, and Usage

The Planetary Science Journal
The NASA Exoplanet Archive (NEA) and the Exoplanet Follow-up Observing Program service are two widely used resources for the exoplanet community. The NEA provides a complete and accurate accounting of exoplanetary systems published by NASA missions and ...
Jessie L. Christiansen, Douglas L. McElroy, Marcy Harbut, David R. Ciardi, Megan Crane, John Good, Kevin K. Hardegree-Ullman, Aurora Y. Kesseli, Michael B. Lund, Meca Lynn, Ananda Muthiar, Ricky Nilsson, Toba Oluyide, Michael Papin, Amalia Rivera, Melanie Swain, Nicholas D. Susemiehl, Raymond Tam, Julian van Eyken, Charles Beichman   +19 more
doaj   +1 more source

Gaia astrometry and exoplanetary science: DR2, (E)DR3, and beyond

Comptes Rendus. Physique, 2023
I review the recent impact of Gaia astrometry in the exoplanet field, both in terms of characterization of the orbits and masses of planetary systems and the properties of their host stars.
Sozzetti, Alessandro
doaj   +1 more source

Neuromorphic Computing with Memcapacitors: Advancements, Challenges, and Future Directions

Advanced Electronic Materials, EarlyView.
Neuromorphic computing reduces energy costs by integrating memory and processing in event‐driven architectures, achieving energy usage as low as 10–30 pJ per operation for memcapacitor‐based synapses. Memcapacitors are reviewed as strong contenders for neuromorphic computing, enhancing AI acceleration through charge‐based computations, high resistance,
Nada AbuHamra, Muhammad Umair Khan, Eman Hassan, Mahmoud Al Qutayri, Baker Mohammad   +4 more
wiley   +1 more source

Detecting Exoplanet Transits with the Next Generation of X-Ray Telescopes

The Astronomical Journal
Detecting exoplanet transits at X-ray wavelengths would provide a window into the effects of high-energy irradiation on the upper atmospheres of planets.
Raven Cilley, George W. King, Lía Corrales   +2 more
doaj   +1 more source