| タイトル | Venus: The First Habitable World of Our Solar System? |
| 本文（外部サイト） | http://hdl.handle.net/2060/20150021298 |
| 著者（英） | Kiang, Nancy; Sohl, Linda; Del Genio, Anthony; Kelley, Maxwell; Way, Michael Joseph; Clune, Tom; Aleinov, Igor |
| 著者所属（英） | NASA Goddard Space Flight Center |
| 発行日 | 2015-10-23 |
| 言語 | eng |
| 内容記述 | A great deal of effort in the search for life off-Earth in the past 20+ years has focused on Mars via a plethora of space and ground based missions. While there is good evidence that surface liquid water existed on Mars in substantial quantities, it is not clear how long such water existed. Most studies point to this water existing billions of years ago. However,those familiar with the Faint Young Sun hypothesis for Earth will quickly realize that this problem is even more pronounced for Mars. In this context recent simulations have been completed with the GISS 3-D GCM (1) of paleo Venus (approx. 3 billion years ago) when the sun was approx. 25 less luminous than today. A combination of a less luminous Sun and a slow rotation rate reveal that Venus could have had conditions on its surface amenable to surface liquid water. Previous work has also provided bounds on how much water Venus could have had using measured DH ratios. It is possible that less assumptions have to be made to make Venus an early habitable world than have to be made for Mars, even thoughVenus is a much tougher world on which to confirm this hypothesis. |
| NASA分類 | Lunar and Planetary Science and Exploration |
| レポートNO | GSFC-E-DAA-TN27812 |
| 権利 | Copyright, Distribution as joint owner in the copyright |
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