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The DAVINCI Mission to Venus

Launching in 2029, NASA’s Deep Atmosphere Venus Investigation of Noble gases, Chemistry and Imaging (DAVINCI) mission will bring a rich suite of instruments to Venus to address long standing questions about Earth’s sister planet. Some scientists think Venus may once have been more Earth-like in the past, with oceans and pleasant surface temperatures -- DAVINCI data will help us determine if this intriguing possibility is true. Clues to Venus’ mysterious past may be hidden in atmospheric gases or in surface rocks formed in association with ancient water in the planet’s mountainous highlands. During two flybys, the DAVINCI carrier, relay, and imaging spacecraft will collect data on the planet’s day side of unknown compounds that absorb ultraviolet light in the Venus upper atmosphere with an instrument called the Compact Ultraviolet to Visible Imaging Spectrometer (CUVIS); on the planet’s night side, the Venus Imaging System for Observational Reconnaissance (VISOR) will sense heat from Venus’ surface emerging from beneath the clouds to help us better understand the composition of diverse geological highlands regions across Venus. VISOR will also study clouds on the Venus day side in the ultraviolet, producing cloud motion movies.   Venus has a scorching surface hotter than your home oven, and a complex atmosphere 90 times thicker than Earth’s made mostly of carbon dioxide and with sulfuric acid clouds. Two years after launch, the DAVINCI descent sphere will by dropped by the carrier spacecraft into this extreme environment to provide new direct measurements of the Venus atmosphere, and to reveal a bird’s eye view of the surface below the clouds. The descent location, the Alpha Regio “tessera,” is a mountainous highland region whose rocks may hold clues to the planet’s mysterious past. The titanium sphere is designed to withstand the harsh conditions of the Venus environment while protecting the instruments nestled inside. The Venus Tunable L