Solar and Heliospheric Observatory
(satellite observing the Sun)
The Solar and Heliospheric Observatory (SOHO) is a spacecraft
launched by the European Space Agency and NASA in 1995 to study and monitor the Sun.
It orbits at the Sun-Earth L1 Lagrangian point.
LASCO consists of three coronagraphs, termed LASCO C1, LASCO C2,
and LASCO C3. They vary in the size of the portion of the sky
they occult, and in the technology they use to do so.
Referenced by pages:
European Space Agency (ESA)
Goddard Space Flight Center (GSFC)