Spektr-UV
The Spektr-UV, also known as World Space Observatory-Ultraviolet (WSO-UV), is a proposed ultraviolet space telescope intended for work in the 115 nm to 315 nm wavelength range. Launch had initially been planned for 2007, but has since been continually delayed; as of March 2020, the launch is planned for October 2025 atop an Angara A5M rocket from Vostochny Cosmodrome. Overview. The main instrument of the observatory is a 1.7-metre Ritchey–Chrétien telescope. The telescope will be equipped with the following instruments: WSO-UV Spectrographs Unit (WUVS) (Russia/Japan). The WUVS spectrographs assembly consists  of four channels: WSO-UV Field Camera Unit (FCU) (Russia/Spain). The FCU has two channels, each fed by an independent pick off mirror: History. In October 2012, tests of antennas for the space telescope were completed. In July 2019, INASAN selected the first seven experiments to be performed by the observatory. Participating nations. Spektr-UV is an international project led by Russia (Roscosmos). At present the international cooperation includes three basic participants: Russia (will provide the telescope, spacecraft, launch facilities, ground segment); Spain (FCU detectors, ground segment); Japan (UVSPEX).