As Rocket Lab prepares to launch a mission to Venus next year, a multidisciplinary research team led by Georgia Tech braved an erupting volcano recently to test an instrument custom-built to explore Venus’ clouds and look for signs of organic chemistry. If successful, the 2026 launch will mark the first private spacecraft to reach Venus, and the first U.S. mission to study its sulfuric acid-filled clouds in nearly 40 years.
The instrument, the autofluorescence nephelometer (AFN) built by Droplet Measurement Technologies, will fire a laser beam out a window and use light scattering from individual particles to measure the size and composition of the planet’s aerosols, the tiny particles that make up the clouds. The AFN will only have about five minutes to collect data as the small probe falls through the clouds, and another 15 minutes to send data back to Earth before things get too extreme. The probe is not expected to reach the surface, where it is hot enough to melt lead, and the pressure is 90 times that of Earth’s surface.
Georgia Tech oversees all of the instrument’s field tests and modeling. The project, called VENUSIAN, is led by Christopher E. Carr, assistant professor in the Daniel Guggenheim School of Aerospace Engineering, with funding from NASA’s PSTAR program.
NASA also built a heat shield for Rocket Lab’s spacecraft and will provide navigation and communications support through the Deep Space Network.
“Is there life in the clouds of Venus? I don’t think so, but if it’s there, I want to find it,” says Carr, who admits that the more he studies Venus, the more interesting it becomes.
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