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.