PicSat is a French observatory nanosatellite, designed to measure the transit of Beta Pictoris b, an exoplanet which orbits the star Beta Pictoris. PicSat was designed and built by a team of scientists led by Dr. Sylvestre Lacour, astrophysicist and instrumentalist at the High Angular Resolution in Astrophysics group in the LESIA laboratory with Paris Observatory, Paris Sciences et Lettres University and the French National Centre for Scientific Research (CNRS). It was launched on January 12, 2018, and operated for more than 10 weeks before falling silent on 20 March 2018.