use large-field images to find new microlensing events. "Follow-up" groups often coordinate telescopes around the world to provide intensive coverage of select events. The initial experiments all had somewhat risqué names until the formation of the PLANET group. There are current proposals to build new specialized microlensing satellites, or to use other satellites to study microlensing. Search collaborations Photographic plate search of bulge. Experience de Recherche des Objets Sombres (EROS) (1993–2002) Largely French collaboration. EROS1: Photographic plate search of LMC: EROS2: CCD search of LMC, SMC, Bulge & spiral arms. MACHO (1993–1999) Australia & US collaboration. CCD search of bulge and LMC. Optical Gravitational Lensing Experiment (OGLE) ( 1992 – ), Polish collaboration established by Paczynski and Udalski. Dedicated 1.3m telescope in Chile run by the University of Warsaw. Targets on bulge and Magellanic Clouds. Microlensing Observations in Astrophysics (MOA) (1998 – ), Japanese-New Zealand collaboration. Dedicated 1.8m telescope in New Zealand. Targets on bulge and Magellanic Clouds. SuperMACHO (2001 – ), successor to the MACHO collaboration used 4 m CTIO telescope to study faint LMC microlenses. Follow-up collaborations Probing Lensing Anomalies Network (PLANET) Multinational collaboration. MicroFUN, Microlensing Follow Up Network Microlensing Planet Search (MPS) Microlensing Network for the Detection of Small Terrestrial Exoplanets, MiNDSTEp RoboNet. Searching for planets using a global network of robotic telescopes Andromeda galaxy pixel lensing MEGA AGAPE (in French) WeCAPP The Angstrom Project PLAN Proposed satellite experiments Galactic Exoplanet Survey Telescope (GEST) SIM Microlensing Key Project would have used the extremely high precision astrometry of the Space Interferometry Mission satellite to break the microlensing degeneracy and measure the mass, distance, and velocity of lenses. This satellite was postponed several times and finally cancelled in 2010. The Nancy Grace Roman Space Telescope, being prepared by NASA for launch in the mid-2020s, will include a microlensing survey along with several other surveys. The microlensing demographics will complement those of the Kepler and TESS missions, with better sensitivity to planets like Earth and Mars that are more likely to be rocky planets in the habitable zone of their suns. See also Gravitational lens OGLE-2019-BLG-0960Lb Terrestrial atmospheric lens References External links Discovery of planet five times as massive as earth orbiting a star 20,000 light-years away Effects of gravitation Gravitational lensing