Astron

Astron was a Soviet spacecraft which was designed to fulfill an astrophysics mission. It was based on the 4MV spacecraft design and was operational for six years as the largest ultraviolet space telescope during its lifetime. Astron's payload consisted of an 80 cm ultraviolet telescope which was designed jointly by the USSR and France, and an X-ray spectroscope on board. It could take UV spectra 150-350 nm.