Which satellite launched first, the Transiting Exoplanet Survey Satellite or Akari?
Transiting Exoplanet Survey Satellite The Transiting Exoplanet Survey Satellite (TESS) is a planned space telescope for NASA's Explorers program, designed to search for exoplanets using the transit method. It is planned for launch in March 2018.
LEGRI The Low Energy Gamma-Ray Imager (LEGRI) was a payload for the first mission of the Spanish MINISAT platform, and active from 1997 to 2002. The objective of LEGRI was to demonstrate the viability of HgI detectors for space astronomy, providing imaging and spectroscopical capabilities in the 10-100 keV range.