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.

[3][4] It is an international project led by Russia (Roscosmos), with participation from Spain and Japan.

The launch had initially been planned for 2007, but has since been continually delayed;[5] as of December 2023[update], the launch is expected to take place no earlier than 2030[1] atop an Angara A5M rocket from Vostochny Cosmodrome.

The telescope will be equipped with the following instruments: The WUVS spectrographs assembly consists of four channels: The FCU has two channels, each fed by an independent pick off mirror: [6][7] In October 2012, tests of antennas for the space telescope were completed.

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).