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| The Planets | Zoom Astronomy |
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| VENUS |
| Introduction | Inside Venus | Atmosphere and Clouds | Transit of Venus | Spacecraft Visits | Web Links |
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| VENUS' ATMOSPHERE AND CLOUD COVER |
VENUS' CLOUD SHROUD
Venus' atmosphere is mostly gaseous carbon dioxide (96%). The remaining components are: 3% nitrogen and 0.003% water vapor. Venus may have had a lot of water sometime in the past, but it probably boiled away in Venus' high temperatures.
The greenhouse effect traps heat in the atmosphere. The thick carbon dioxide atmosphere lets very little infrared radiation escape into space; most is reflected back to the planet.
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