Results 101 to 110 of about 6,063 (251)
Reinvestigating the Nightside Ionosphere of Mars With 8 Years of Mars Express and MAVEN Data
Journal of Geophysical Research: Space Physics, Volume 131, Issue 6, June 2026.Abstract Tailward ion escape in the nightside magnetotail is one of the dominant paths of ion escape from Mars. The Martian nightside ionosphere can serve as a major reservoir for this escape channel, but its global distributions and dependence on the upstream solar wind have not been fully investigated due to observational limitations.
N. Takeuchi +2 more
wiley +1 more source
High‐Resolution Potassium Observations of the Lunar Exosphere
Geophysical Research Letters, 2019 We observed lunar exospheric potassium D1 (7,698.9646 Å) emissions using a high‐spectral resolution Fabry‐Perot spectrometer in 2014. We present the first potassium line profile measurements, which are representative of the potassium velocity ...
S. Rosborough +8 more
semanticscholar +1 more source
Effects of Comet Encke's Meteoroid Stream on the Seasonal Variation of Mercury's Ca Exosphere
Journal of Geophysical Research: Planets, Volume 131, Issue 6, June 2026.Abstract Mercury's calcium (Ca) exosphere, observed by NASA's MESSENGER mission, exhibits high temperatures (>50000 K) and pronounced seasonal variability, with its source mainly on the dawn side. Enhanced Ca emission near True Anomaly Angle (TAA) ∼25° and ∼150° has been attributed to Comet 2P/Encke meteoroid streams.
M. Moroni +18 more
wiley +1 more source
Search for spectroscopical signatures of transiting HD 209458b's exosphere [PDF]
, 2001 Following recent attempts to detect the exosphere of the extra-solar planet 51 Pegb in the infrared (Coustenis et al. [CITE], [CITE]; Rauer et al. [CITE]), we discuss here a search for optical spectroscopic signatures from a gaseous extended envelope (
A. Kaufer +6 more
core +1 more source
Modeling Results on the Seasonal Influence at the Martian Exosphere [PDF]
, 2015 International audienceAnalysis of HST ACS/SBC images of Mars in the far-ultraviolet taken in Oct-Nov 2007 and May-November 2014 indicate seasonal influence as a driving factor of the hydrogen corona, as has been reported earlier. To derive the changes in
Mayyasi, Majd +4 more
core
The hydrogen Lyman α line shape in the exospheres of terrestrial objects in the solar system
Frontiers in Astronomy and Space SciencesThe exospheres of all objects are mostly made of atomic hydrogen. Because the Sun is bright in Lyman α, the properties of the H atoms in the exospheres of certain terrestrial solar system objects can be studied by analyzing the resonantly scattered solar
Dolon Bhattacharyya +8 more
doaj +1 more source
Observations of Mercury's Exosphere: Composition and Structure [PDF]
, 2018 Mercury is surrounded by a tenuous exosphere in which particles travel on ballistic trajectories under the influence of a combination of gravity and solar radiation pressure.
Cassidy, Timothy A. +5 more
core +1 more source
Solar spectral irradiance from the CODET model for studying planetary exospheres: Earth and Mars
Frontiers in Astronomy and Space SciencesSolar variability and solar spectral irradiance (SSI) are important for studying planetary atmospheres, particularly the ionosphere–thermosphere–mesosphere (ITM) system, and planetary exospheres.
Jenny M. Rodríguez-Gómez
doaj +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
Research progress on the exosphere and its variability of terrestrial bodies
地球与行星物理论评Exosphere is an essential component of the atmospheres of terrestrial bodies. Its structure and variability hold significant scientific values for understanding planetary material loss, atmospheric evolution, and habitability.
Wenlong Li +5 more
doaj +1 more source