page_title: Pioneer Venus project
hierarchical_section_title: Pioneer Venus project
caption_attribution_description: English: Ultraviolet image of Venus' clouds as seen by the Pioneer Venus Orbiter (February 26, 1979). The immense C- or Y-shaped features which are visible only in these wavelengths are individually short lived, but reform often enough to be considered a permanent feature of Venus' clouds. The mechanism by which Venus' clouds absorb ultraviolet is not well understood. Русский: Фотография Венеры, сделанная КА Пионер 26 II 1979 в ультрафиолетовом диапазоне. Огромные C- и Y- образные структуры, видимые только в этом диапазоне, недолговечны, но образовываются достаточно часто, чтобы рассматриваться как постоянная особенность венерианских облаков. Механизм поглощения ультрафиолета венерианскими облаками пока недостаточно изучен. Polski: Widok wenusjańskich chmur w paśmie ultrafioletu, widziany z sondy "Pioneer Venus Orbiter". Wielkie układy w kształcie liter "C" lub "Y", widoczne tylko w tej długości fal pojawiają się na krótko, ale są obserwowane na tyle często, że mogą być postrzegane, jako stała cecha chmur Wenus. Mechanizm, dzięki któremu chmury te pochłaniają ultrafiolet, nie jest jeszcze zbyt dobrze rozumiany. Español: Venus observado por la sonda estadounidense Pioneer Venus. Português: Vénus observada pela sonda norte-americana Pioneer Venus.
context_page_description: The Pioneer Venus project was part of the Pioneer program consisting of two spacecraft, the Pioneer Venus Orbiter and the Pioneer Venus Multiprobe, launched to Venus in 1978. The program was managed by NASA's Ames Research Center.
  The Pioneer Venus Orbiter entered orbit around Venus on December 4, 1978, and performed observations to characterize the atmosphere and surface of Venus. It continued to transmit data until October 1992.
  The Pioneer Venus Multiprobe deployed four small probes into the Venusian atmosphere on December 9, 1978. All four probes transmitted data throughout their descent to the surface. One probe survived landing and transmitted data from the surface for over an hour.
context_section_description: The Pioneer Venus project was part of the Pioneer program consisting of two spacecraft, the Pioneer Venus Orbiter and the Pioneer Venus Multiprobe, launched to Venus in 1978. The program was managed by NASA's Ames Research Center.
  The Pioneer Venus Orbiter entered orbit around Venus on December 4, 1978, and performed observations to characterize the atmosphere and surface of Venus. It continued to transmit data until October 1992.
  The Pioneer Venus Multiprobe deployed four small probes into the Venusian atmosphere on December 9, 1978. All four probes transmitted data throughout their descent to the surface. One probe survived landing and transmitted data from the surface for over an hour.
caption: Cloud structure in the Venusian atmosphere in 1979, revealed by ultraviolet observations by Pioneer Venus Orbiter
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