Results 11 to 20 of about 55,918 (290)

The Chemical Composition of the Atmosphere of Venus [PDF]

Symposium - International Astronomical Union, 1971
The chemical composition sensors on the Venera-4, -5, and -6 spacecraft are described. The mixing ratio by volume of carbon dioxide is determined to be 97 (+3, −4)%; nitrogen, less than 2%, oxygen, less than about 0.1%; and water vapor at the 25 °C temperature level, on the order of 10 mg/l, an amount large enough to imply that the clouds of Venus are ...
A. P. Vinogradov, Yu. A. Surkov, B. M. Andreichikov, O. M. Kalinkina, I. M. Grechischeva   +4 more
openaire   +2 more sources

A Comparison of Water Vapor Line Parameters for Modeling the Venus Deep Atmosphere [PDF]

, 2009
The discovery of the near infrared windows into the Venus deep atmosphere has enabled the use of remote sensing techniques to study the composition of the Venus atmosphere below the clouds. In particular, water vapor absorption lines can be observed in a
Allen, Allen, Bailey, Bailey, Bailey, Barber, Belmiloud, Bertaux, Brown, Brown, Carlson, Casanova, Chevillard, Crisp, Crisp, De Bergh, Delaye, Drossart, Fischer, Giver, Gurwell, Hough, Humlicek, Ignatiev, Jacquinet-Husson, Jacquinet-Husson, Jeremy Bailey, Krasnopolsky, Langlois, Mandin, Marcq, Marcq, Meadows, Moroz, Moroz, Partridge, Pollack, Rothman, Rothman, Rothman, Rothman, Rothman, Rothman, Rothman, Rothman, Sandor, Schreier, Schwenke, Seiff, Shirin, Simeckova, Smith, Stamnes, Taylor, Toth, Tsang, Van Vleck, von Zahn, Young, Yung   +59 more
core   +2 more sources

Abiotic ozone in the observable atmospheres of Venus and Venus-like exoplanets [PDF]

Monthly Notices of the Royal Astronomical Society
ABSTRACT Ozone is a potential biosignature and disambuguator between Earth-like and Venus-like exoplanets due to its association on Earth with photosynthetically produced oxygen (O$_2$). However, the existence of ozone in Venus’s observable atmosphere, a planet with no known life, raises the possibility of ozone biosignature false ...
Robb Calder, Oliver Shorttle, Sean Jordan, Paul Rimmer, Tereza Constantinou   +4 more
openaire   +4 more sources

Photoactive elemental sulfur allotropes promote extensive ammonia synthesis in Venus-like atmosphere. [PDF]

Nat Commun
Li Y, Yin R, Ye H, Hu Z, Zhu J, Du Y, Lai Y, Ding H, Lu A, Li Y.   +9 more
europepmc   +3 more sources

On light refraction in the atmosphere of Venus [PDF]

, 1967
Calculation of light refraction in Venus atmosphere from Venera 4 satellite ...
Skotnikov, M. M.
core   +2 more sources

The importance of carbonatite lavas in outgassing Venus' modern-day atmosphere. [PDF]

Sci Adv
Trussell AR, O'Rourke JG, Williams DA, Flynn ITW, Black BA, Borrelli ME.   +5 more
europepmc   +2 more sources

The Influence of Cloud Condensation Nucleus Coagulation on the Venus Cloud Structure

The Planetary Science Journal, 2023
We present the Venus version of PlanetCARMA and demonstrate the significance of coagulation properties on the structure of the Venus cloud system. The composition of the smallest mode of particles in the Venus atmosphere, which likely serve as cloud ...
Kevin McGouldrick, Erika L. Barth
doaj   +1 more source

ATMOSPHERIC CHEMISTRY OF VENUS-LIKE EXOPLANETS [PDF]

The Astrophysical Journal, 2011
We use thermodynamic calculations to model atmospheric chemistry on terrestrial exoplanets that are hot enough for chemical equilibira between the atmosphere and lithosphere, as on Venus. The results of our calculations place constraints on abundances of spectroscopically observable gases, the surface temperature and pressure, and the mineralogy of the
Schaefer, Laura, Fegley Jr, Bruce
openaire   +2 more sources

A WISPR of the Venus Surface: Analysis of the Venus Nightside Thermal Emission at Optical Wavelengths

The Planetary Science Journal, 2023
Parker Solar Probe (PSP) conducted several flybys of Venus while using Venus’ gravity for orbital adjustments to enable its daring passes of the Sun. During these flybys, PSP turned to image the nightside of Venus using the Wide-field Imager for Solar ...
J. Lustig-Yaeger, N. R. Izenberg, M. S. Gilmore, L. C. Mayorga, E. M. May, A. Vourlidas, P. Hess, B. E. Wood, R. A. Howard, N. E. Raouafi, G. N. Arney   +10 more
doaj   +1 more source

To the question of including additional technical means in the Venus exploration program

Космические аппараты и технологии, 2022
The current issue of expanding the scheme of the experiment for the contact research of Venus by including a multirotor aircraft as an additional technical means of research in a prospective expedition is considered.
M. Yu. Yatsenko, V. A. Vorontsov
doaj   +1 more source