The abundances of constituents of Titan's atmosphere from the GCMS instrument on the Huygens probe
- H. Niemann, S. Atreya, S. Way
- Environmental Science, PhysicsNature
- 8 December 2005
Direct atmospheric measurements from the Gas Chromatograph Mass Spectrometer (GCMS), including altitude profiles of the constituents, isotopic ratios and trace species (including organic compounds), were reported, confirming the primary constituents were confirmed to be nitrogen and methane.
Smoke and Dust Particles of Meteoric Origin in the Mesosphere and Stratosphere
Abstract A height profile of ablated mass from meteors is calculated, assuming an incoming mass of 10−16 g cm−2 s−1 (44 metric tons per day) and the velocity distribution of Southworth and Sekanina,…
The composition of the Jovian atmosphere as determined by the Galileo probe mass spectrometer.
- H. Niemann, S. Atreya, S. Way
- PhysicsJournal of Geophysical Research
- 25 September 1998
Analysis of some of the constituents detected suggests that icy planetesimals made significant contributions to the volatile inventory, and (4) a moderate decrease in D/H but no detectable change in (D + 3He)/H in this part of the galaxy during the past 4.6 Gyr.
The microphysics of the clouds of Venus: Results of the Pioneer Venus Particle Size Spectrometer Experiment
- R. Knollenberg, D. Hunten
- Physics, Environmental Science
- 30 December 1980
The results of the particle size spectrometer experiment on the Pioneer Venus sounder probe are presented. The vertical cloud structure is found to consist of three primary cloud regions of…
Helium in Jupiter's atmosphere: Results from the Galileo probe Helium Interferometer Experiment
- U. Zahn, D. Hunten, G. Lehmacher
- Physics, Geology
- 25 September 1998
On December 7, 1995, the NASA Galileo probe provided the first in situ measurements of the helium abundance in the atmosphere of Jupiter. Our Jamin interferometer measured precisely the refractive…
The Escape of Light Gases from Planetary Atmospheres
- D. Hunten
- Physics
- 1 November 1973
Abstract The Jeans-Spitzer treatment of atmospheric escape by evaporation must be supplemented, for a mixture of gases, by a discussion of the mutual diffusion and mixing of the components. A recent…
Understanding the Lunar Surface and Space-Moon Interactions
- P. Lucey, R. Korotev, S. Maurice
- Geology, Physics
- 2006
The surface of the Moon is a critical boundary that shapes our understanding of the Moon as a whole. All geologic mapping and remote sensing techniques utilize only the outermost portion of the Moon.…
Mass fractionation in hydrodynamic escape
- D. Hunten, R. Pepin, JAMES C. G. Walker
- Physics, Geology
- 1 March 1987
Venus II--geology, geophysics, atmosphere, and solar wind environment
- S. Bougher, D. Hunten, R. Phillips
- Physics, Geology
- 1997
The final orbit of Venus by the Magellan spacecraft in October 1994 brought to a close an exciting period of Venus reconnaissance and exploration. The scientific studies resulting from data collected…
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