High Quality Content by WIKIPEDIA articles! The Young Engineers` Satellite 2 (YES2) is a 36 kg student-built tether satellite that is part of ESA`s Foton-M3 microgravity mission. The launch of the Russian Foton-M3 occurred on September 14, 2007 at 13:00 (CEST) by a Soyuz-U launcher. The project was carried out by Delta-Utec SRC and supervised by the ESA Education Office and was nearly entirely designed and build by students and young engineers.