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Global Mineralogical and Aqueous Mars History Derived from OMEGA/Mars Express Data
Global mineralogical mapping of Mars by the Observatoire pour la Mineralogie, l'Eau, les Glaces et l'Activité (OMEGA) instrument on the European Space Agency's Mars Express spacecraft provides new…
Detection of Methane in the Atmosphere of Mars
- V. Formisano, S. Atreya, T. Encrenaz, N. Ignatiev, M. Giuranna
- Chemistry, MedicineScience
- 3 December 2004
We report a detection of methane in the martian atmosphere by the Planetary Fourier Spectrometer onboard the Mars Express spacecraft. The global average methane mixing ratio is found to be 10 ± 5…
The deuterium abundance in Jupiter and Saturn from ISO-SWS observations
Observations with the Short Wavelength Spectrometer (SWS) onboard the Infrared Space Observatory (ISO) are used to determine the D/H ratio in Jupiter's and Saturn's atmospheres. The D/H ratio is…
A comparison of the atmospheres of Jupiter and Saturn: deep atmospheric composition, cloud structure, vertical mixing, and origin.
- S. Atreya, M. Wong, +5 authors T. Encrenaz
- Physics, MedicinePlanetary and space science
- 1 October 1999
The current understanding of the composition, vertical mixing, cloud structure and the origin of the atmospheres of Jupiter and Saturn is presented and a much more vigorous vertical mixing in Saturn's middle-upper atmosphere than in Jupiter's is pointed to.
External supply of oxygen to the atmospheres of the giant planets
- H. Feuchtgruber, E. Lellouch, T. Graauw, B. Bézard, T. Encrenaz, M. Griffin
- Chemistry, MedicineNature
- 11 September 1997
The detection of gaseous H2O in the upper atmospheres of Saturn, Uranus and Neptune is reported by infrared spectroscopy and may help to constrain the injection rate and possible activity of distant icy objects in the Solar System.
Subsurface properties and early activity of comet 67P/Churyumov-Gerasimenko
Subsurface temperatures showed seasonal and diurnal variations, which indicated that the submillimeter radiation originated at depths comparable to the diurnal thermal skin depth of comet 67P/Churyumov-Gerasimenko.
Titan’s atmosphere from ISO mid-infrared spectroscopy
Abstract We have analyzed Titan observations performed by the Infrared Space Observatory (ISO) in the range 7–30 μm. The spectra obtained by three of the instruments on board the mission (the short…
MIRO: Microwave Instrument for Rosetta Orbiter
The European Space Agency Rosetta Spacecraft, launched on March 2, 2004 toward Comet 67P/Churyumov-Gerasimenko, carries a relatively small and lightweight millimeter-submillimeter spectrometer…
The organic-rich surface of comet 67P/Churyumov-Gerasimenko as seen by VIRTIS/Rosetta
The VIRTIS instrument on board the Rosetta spacecraft has provided evidence of carbon-bearing compounds on the nucleus of the comet 67P/Churyumov-Gerasimenko, and no ice-rich patches are observed, indicating a generally dehydrated nature for the surface currently illuminated by the Sun.
ISO-SWS Observations of Jupiter: Measurement of the Ammonia Tropospheric Profile and of the 15N/14N Isotopic Ratio
We present the results of the Infrared Space Observatory Short Wavelength Spectrometer (ISO-SWS) observations of Jupiter related to ammonia. We focus on two spectral regions; the first one (the 10-μm…