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| Photo-Illustration: Wired Staff; Getty Images; Courtesy of Nasa |
Although NASA's Nancy Grace Roman Space Telescope is primarily known for its powerful wide-field survey capabilities, its most important long-term contribution may be a smaller, experimental instrument hidden inside it: an advanced coronagraph. The coronagraph is designed to block the overwhelming light of a star so astronomers can directly observe much fainter planets orbiting nearby. Roman's version is far more sophisticated than the coronagraphs flown on Hubble or James Webb because it incorporates adaptive optics and deformable mirrors that can actively reshape themselves to counter tiny optical distortions.
This technology is a crucial steppingstone toward a future telescope capable of photographing Earth-like planets around Sun-like stars. Roman's coronagraph faces an extraordinary challenge, likened to spotting a firefly beside a floodlight from across the country. By testing active wavefront control and ultra-precise light suppression in space for the first time, NASA hopes to learn what is needed for future missions such as the proposed Habitable Worlds Observatory. Even if the coronagraph itself produces only a limited number of exoplanet images, its real value is demonstrating a technology that could eventually help scientists search for worlds that may resemble Earth.
See the full article on WIRED.
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