Results 191 to 200 of about 53,886 (238)

Engineering models of the Venus atmosphere

11th Aerospace Sciences Meeting, 1973
Engineering models of the Mars atmosphere are presented for use in spacecraft design and mission planning. The models are developed from (1) data measured by the U.S. Mariner 4, 6, 7, and 9 and USSR Mars 2 and 3 spacecraft, (2) earth-based measurements, and (3) theory which best satisfies the observations. The models include a nominal model for a clear
RICHARD B. NOLL, MICHAEL B. McELROY
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Venera 4 Probes Atmosphere of Venus

Science, 1968
The atmospheric data and information on trajectory received from Venera 4 together provide consistent and firm evidence of its success in reaching the surface of Venus.
D E, Reese, P R, Swan
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Venus' rotation and atmospheric tides

Nature, 1978
VENUS rotates with a period of 243.00 ± 0.04 d retrograde. The obliquity, or angle between the spin vector and orbit vector is 178 ± 1° (ref. 1). Both the long period and the near 180° obliquity suggest that the spin has evolved under the influence of tidal torques. Tides raised by the Sun in the body of Venus would de-spin the planet in ~10^8 yr if no
Ingersoll, Andrew P., Dobrovolskis, Anthony R.   +1 more
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Probing the Venus atmosphere

7th Annual Meeting and Technical Display, 1970
Venus atmosphere exploration by multiple entry probe, describing spacecraft system design, launch and earth-Venus transfer trajectory, approach and entry sequence ...
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Venus’s atmosphere is unexpectedly complex

C&EN Global Enterprise, 2020
Spacecraft first measured the chemical makeup of Venus’s atmosphere in the 1960s. By the late 1970s, scientists agreed that available data suggested the Venusian atmosphere was uniformly 3.5% nitro...
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Structure of the Venus atmosphere

Planetary and Space Science, 2007
Abstract The structure of the Venus atmosphere is discussed. The data obtained in the 1980s by the last Soviet missions to Venus: orbiters Venera 15, 16 and the entry probes and balloons of Vega 1 and 2 are compared with the Venus International Reference Atmosphere (VIRA) model. VIRA is based on the data of the extensive space investigations of Venus
L.V. Zasova, N. Ignatiev, I. Khatuntsev, V. Linkin   +3 more
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Buoyant probes into the Venus atmosphere.

Journal of Spacecraft and Rockets, 1965
A brief study is made of Venus probes that would be capable of entering the planet's atmosphere and staying in static equilibrium at higher and cooler altitudes, thus avoiding the high temperatures closer to the surface. These probes would be launched by Saturn C-1B boosters.
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Atmospheric Circulation on Venus

2019
Venus is a slowly rotating planet with a thick atmosphere (~9.2 MPa at the surface). Ground- and satellite-based observations have shown atmospheric superrotation (atmospheric rotation much faster than solid surface rotation), global-scale cloud patterns (e.g., Y-shaped and bow-shaped structures), and polar vortices (polar hot dipole and fine ...
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Venus atmospheric platform options revisited

Advances in Space Research, 2010
Various balloon systems intended as scientific platforms to float in the atmosphere of Venus at altitudes between about 35 and 65 km are briefly reviewed. Previous predictions of the altitude oscillations of balloons filled with helium gas and water vapor are largely confirmed through numerical simulation and analysis.
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The evolution of venus' atmosphere

Planetary and Space Science, 1969
Abstract Although the atmospheres of the terrestrial planets may have originated by similar mechanisms and during a similar epoch, their subsequent developments followed divergent paths, partly as the result of different Sun-planet distances. On such a premise a self-consistent model has been devised to explain the present dense CO2 atmosphere of ...
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