NASA’s Planet Hunter TESS Resumes Normal Operations

Artist concept of TESS observing an M dwarf star with orbiting planets. Credit: NASA’s Goddard Space Flight Center

On Thursday, October 13, at around 6:30 p.m. EDT TESS) began its return to normal operations. Engineers successfully powered up the instrument, and the spacecraft resumed its regular fine-pointing mode. TESS entered into safe mode on October 10 following a reset of its flight computer. The team will continue analyzing data to determine the cause.  

Launched in 2018, TESS has been scanning almost the entire sky looking for planets beyond our solar system, known as exoplanets. TESS has also uncovered other cosmic phenomena, including a white dwarf abruptly switching on and off, star-shredding black holes, and stellar oscillations.

TESS surveys the entire sky over the course of two years by breaking it up into 26 different sectors, each 24 degrees by 96 degrees across. Powerful cameras on the spacecraft stare at each sector for at least 27 days, looking at the brightest stars at a two-minute cadence. From Earth, the moon occupies half a degree, which is less than 1/9,000th the size of the TESS tiles. TESS is creating a catalog of thousands of Astronomers Discover Multiplanet System With Two Earth-Sized Planets30 Exocomets Discovered in Young Planetary SystemAstronomers’ Discovery of a Lifetime: Extremely Unusual StarTESS Finds Almost 100 Quadruple Star SystemsNewly-Discovered Planets Are Doomed

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