The first generation was from 1971 to 1979, the second generation was from 1979 to 1989, and the third generation is from 1995 to the present. The first generation consists of OSO-7 and Skylab, the second generation consists of SMM and P78-1, and the third generation currently consists of SOHO, Coriolis, STEREO, PSP, and SolO.
Discover more from astrobites
Subscribe to get the latest posts to your email.
