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On July 4, NASA’s Transiting Exoplanet Survey Satellite (TESS) completed its primary mission, a two-year-long survey that imaged about 75% of the starry sky. In capturing this giant mosaic, TESS has found 66 new exoplanets, or worlds beyond our solar system, as well as nearly 2,100 candidates astronomers are working to confirm. TESS monitors 24-by-96-degree strips of the sky, called sectors, for about a month using its four cameras. The mission spent its first year observing 13 sectors comprising the sout
