TESS extended mission Archives

April 25, 2023April 26, 2023 by Laurence Tognetti

TESS Reaches Fifth Anniversary of Extraordinary Mission, but its Work is Far from Over

Artist illustration of NASA’s Transiting Exoplanet Survey Satellite (TESS) observing the heavens. (Credit: NASA's Goddard Space Flight Center)

NASA’s TESS (Transiting Exoplanet Survey Satellite) mission recently reached its fifth anniversary of service to humanity as it continues to tirelessly scan the heavens for worlds beyond. Dubbed as an all-sky mission, TESS was launched on April 18, 2018, aboard a SpaceX Falcon rocket. During its five years in space, TESS’s four 24 degrees by 24 degrees field-of-view CCD cameras have successfully mapped greater than 93% of the cosmos.

October 16, 2022October 16, 2022 by Matt Williams

TESS has Resumed Normal Operations

An artist’s rendition of the Transiting Exoplanet Survey Satellite (TESS). Credit: NASA's Goddard Space Flight Center

In April 2018, NASA launched the Transiting Exoplanet Survey Satellite (TESS), the successor to the Kepler Space Telescope that revolutionized the exoplanet studies field. Like its predecessor, TESS has been scanning almost the entire sky for five years for extrasolar planets using the Transit Method. This consists of monitoring thousands of stars for periodic dips in brightness, which may indicate a planet passing in front of the star relative to the observer. To date, TESS has made 243 confirmed discoveries, with another 4562 candidates – or TESS Objects of Interest (TOI) – awaiting confirmation.

On Monday, October 10th, fans of the TESS mission and the research it conducts got a bit of a scare as the observatory experienced a malfunction and had to be put into safe mode. Three days later, at around 06:30 PM EDT (03:30 PM PDT) on October 13th, NASA announced that their engineers had successfully powered up the instrument and brought it back online. While technicians at NASA are still investigating the cause of the malfunction, the spacecraft is now back in its fine-pointing mode and has resumed its second extended mission (EM2).

January 26, 2022January 26, 2022 by Evan Gough

5,000 Exoplanets!

An artist's illustration of NASA's TESS with Earth and the Moon. Image Credit: NASA

Before NASA’s TESS (Transiting Exoplanet Survey Satellite) mission launched in 2018, astronomers tried to understand what it would find in advance. One study calculated that TESS would find between 4430 and 4660 new exoplanets during its primary two-year-long mission.

The primary mission (PM) is over, and TESS is in its extended mission (EM) now. The extended mission is 1.5 years old, and TESS has discovered 176 confirmed exoplanets and 5164 candidates. Scientists are still going through data from the primary mission, so the data might be hiding many more exoplanets. And TESS isn’t finished yet.