Because the super-pressure type balloon have potential to travel long time a wide range flown by the strong winds on the Venus, it is considered to be one of the candidate systems for the atmosphere observations. The water vapor pressure balloon is available under the cloud region in the lower atmosphere of the Venus. In order to transport the balloon to the appropriate altitude, a small capsule and its direct entry to the Venus atmosphere has been proposed and investigated here in a working team of the ISAS/JAXA. A feasibility study of the Venus entry-capsule and the balloon observation is presented in this paper together with the recent development researches concerned.
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