Results 81 to 90 of about 6,471 (197)
Exospheric temperature of Venus from Mariner 5 [PDF]
Symposium - International Astronomical Union, 1971 The Lyman alpha measurements made on the sunlit side of Venus by Mariner 5 showed that the distribution of the radiating hydrogen atoms was governed by two scale heights. A revised model is presented in which the inner or cold distribution is attributed to hydrogen atoms in thermal equilibrium with the thermosphere and the outer or hot distribution is ...
openaire +1 more source
The Roles of Tidal Evolution and Evaporative Mass Loss in the Origin of CoRoT-7 b
, 2010 CoRoT-7 b is the first confirmed rocky exoplanet, but, with an orbital semi-major axis of 0.0172 AU, its origins may be unlike any rocky planet in our solar system.
Abe +69 more
core +3 more sources
Seasonal Water "Pump" in the Atmosphere of Mars: Vertical Transport to the Thermosphere
, 2019 We present results of simulations with the Max Planck Institute general circulation model (MPI-MGCM) implementing a hydrological cycle scheme. The simulations reveal a seasonal water "pump" mechanism responsible for the upward transport of water vapor ...
Hartogh, Paul +3 more
core +1 more source
Storm-time variability of terrestrial hydrogen exosphere: kinetic simulation results
Frontiers in Astronomy and Space SciencesRecent studies of TWINS Lyman-α observations have reported an increase in geocoronal column brightness during geomagnetic storms, indicating enhanced exospheric hydrogen atom density (NH).
Hyunju K. Connor +9 more
doaj +1 more source
Investigation of the daytime lunar atmosphere [PDF]
Lunar atmosphere research has tended to center on gases with predictably large sources and on those which have been identified by Apollo experiments.
Hodges, R. R., Jr.
core +1 more source
Quantum-limited measurements of optical signals from a geostationary satellite
, 2017 The measurement of quantum signals that traveled through long distances is of fundamental and technological interest. We present quantum-limited coherent measurements of optical signals, sent from a satellite in geostationary Earth orbit to an optical ...
Bayraktar, Ömer +15 more
core +1 more source
Geophysical Research LettersThe variability of Mars exosphere over monthly to solar‐cycle scales at 251 and 412 km altitude is quantified by analysis of 41‐Ls mean densities derived from precise orbit determination of the Mars Reconnaissance Orbiter (MRO) and Mars Odyssey (MO ...
J. M. Forbes +4 more
doaj +1 more source
Meteoritic influence on sodium and potassium abundance in the lunar exosphere measured by LADEE
Geophysical Research Letters, 2016 The Lunar Atmosphere and Dust Environment Explorer (LADEE) orbited the Moon for approximately 6 months, taking data with the Lunar Dust Experiment (LDEX), Ultraviolet‐Visible Spectrometer (UVS), and Neutral Mass Spectrometer (NMS).
Jamey R. Szalay +3 more
doaj +1 more source
Charge exchange lifetimes for ions in the magnetosphere [PDF]
Latest and best measurements of physical quantities involved in complete calculation of the charge exchange lifetime of mirroring magnetospheric ions are coalesced and summarized.
Bewtra, N. K., Smith, P. H.
core +1 more source
Geophysical Research LettersThe Moon encountered an extreme space weather event (NOAA G5 class) on 10 May 2024, caused by a series of coronal mass ejections (CMEs). Chandra's Atmospheric Composition Explorer‐2 (CHACE‐2), a neutral gas mass spectrometer on board Chandrayaan‐2 ...
M. B. Dhanya +5 more
doaj +1 more source