Which observatory/satellite was launched into space first, Hakucho or Chandra X-ray Observatory?
Hakucho Hakucho (also known as CORSA-b before launch) was Japan's first X-ray astronomy satellite, developed by the Institute of Space and Aeronautical Science (then a division of the University of Tokyo). It was launched by the ISAS M-3C-4 rocket on February 21, 1979 and reentered the atmosphere on April 16, 1985 .
Rohini (satellite) Rohini is the name given to a series of satellites launched by the Indian Space Research Organisation (ISRO). The Rohini series consisted of four satellites, all of which were launched by the Satellite Launch Vehicle (SLV) and three of which made it successfully to orbit. The series were mostly experimental satellites.