TESS mission

The Transiting Exoplanet Survey Satellite (TESS) is a two-year survey that will discover exoplanets in orbit around bright stars.

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Proposing science

The TESS Guest Investigator Program is an annual call where scientists can propose new observations and receive funding and support.

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Data access

Access simulated data, documentation, data analysis software, and find information on the follow-up observing program.

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News for scientists


TESS Spacecraft Starts Science Operations

NASA’s Transiting Exoplanet Survey Satellite has started its search for planets around nearby stars, officially beginning science operations on July 25, 2018. TESS is expected to transmit its first series of science data back to Earth in August, and thereafter periodically every 13.5 days, once per orbit, as ...

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NASA’s TESS spacecraft continues testing prior to first observations

After a successful launch on April 18, 2018, NASA's newest planet hunter, the Transiting Exoplanet Survey Satellite, is currently undergoing a series of commissioning tests before it begins searching for planets. The TESS team has reported that the spacecraft and cameras are in good health, and the spacecraft has successfully ...

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TESS Input Catalog Updated

The TESS mission is pleased to announce the release of the updated version of the TESS Input Catalog and associated documentation. TIC-6 is a compiled catalog of 700 million stars and galaxies across the whole sky. It includes positions, proper motions, parallaxes, and colors of stars, along with derived physical ...

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TESS successfully completes lunar flyby

TESS successfully completed a lunar flyby on 17 May at 06:34:35 UTC (2:34 AM EST). At its closest approach, TESS was 8,253 km from the lunar surface. Based on the successful lunar flyby, no adjustment burn was required. The next maneuver is the Period Adjust Maneuver ...

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