Transiting Exoplanet Survey Satellite
TESS is orbiting the Earth with a period of about 14 days, which is half of the period of the Moon. The orbit is highly elliptical, closer to the Earth at some points but very far at other times.  TESS has four high-resolution cameras and continuously takes photos of the sky. It sends the photos to the laboratory on Earth which makes them available to scientists to study. Members of the public, like astronomy hobbyists and enthusiasts, can also download and see the photos.