
1) Japanese invention
Found on
https://www.crosswordclues.com/clue/yohkoh

Yohkoh (ようこう, Sunbeam in Japanese), known before launch as Solar-A, was a Solar observatory spacecraft of the Institute of Space and Astronautical Science (Japan), in collaboration with space agencies in the United States and the United Kingdom. It was launched into Earth orbit on August 30, 1991 by the M-3S-5 rocket from Kagoshima Space C...
Found on
http://en.wikipedia.org/wiki/Yohkoh

Japanese satellite that provided continuous monitoring of the Sun from 1991 to 2001.
Found on
http://www.britannica.com/eb/a-z/y/9

A Japanese-led mission, launched by ISAS (Institute of Space and Astronautical Science) with collaboration from the United States and Britain, which in 2001 celebrated a decade of solar X-ray imaging. It is the first spacecraft to continuously observe the Sun in X-rays over an entire sunspot cycle a...
Found on
http://www.daviddarling.info/encyclopedia/Y/Yohkoh.html
No exact match found.