The Orion space telescopes were a series of two instruments flown aboard Soviet spacecraft during the 1970s to conduct ultraviolet spectroscopy of stars.
[1] Orion 2 was installed onboard Soyuz 13 in December 1973, a spacecraft modified to become the first manned space observatory.
The designer of the observatory was Grigor Gurzadyan, then at Garni Space Astronomy Laboratory in Armenia.
Ultraviolet spectrograms of thousands of stars to as faint as 13th stellar magnitude were obtained by a wide-angle meniscus telescope.
Two-photon emission in that planetary nebula and a remarkable star cluster in Auriga were also discovered.