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MIT professor emeritus of planetary physics Gordon Pettengill, a pioneer in radio astronomy, has died at 95. Pettengill helped repurpose military radar technology for science and space exploration and contributed to numerous NASA missions.
Credits: Photo: Kelsy Cain Next image Found in jewelry, car parts, pigments, and industrial chemical reactions, the metal chromium and its compounds are often employed for their color, finish, and anti-corrosive and catalytic properties. Currently, geoscientists and paleoceanographers from MIT and the Woods Hole Oceanographic Institution (WHOI) are looking to add another use to that list: as a way to examine chemical shifts in ancient Earth’s oceans and atmosphere that are preserved in the seafloor’s paleorecord. More specifically, they want to reconstruc...
Credits: Image: iStockphoto Next image The world’s oceans are a vast repository for gases including ozone-depleting chlorofluorocarbons, or CFCs. They absorb these gases from the atmosphere and draw them down to the deep, where they can remain sequestered for centuries and more. Marine CFCs have long been used as tracers to study ocean currents, but their impact on atmospheric concentrations was assumed to be negligible. Now, MIT researchers have found the oceanic fluxes of at least one type of CFC, known as CFC-11, do in fact affect atmospheric concentrati...
Credits: Image: NASA/JPL-Caltech Caption: Clockwise from top left: Maya Nasr, Michael H Hecht, the Mars2020/Perseverance rover, Ben Weiss and Tanja Bosak. Credits: Image: MIT News. Rover image courtesy of NASA/JPL-Caltech Caption: Technicians in the clean room are carefully lowering the Mars Oxygen In-Situ Resource Utilization Experiment (MOXIE) instrument into the belly of the Perseverance rover. Credits: Image: NASA/JPL-Caltech ...