Kosmos 225 (Russian: Космос 225 meaning Cosmos 225), also known as DS-U1-Ya No.2, was a Soviet satellite which was launched in 1968 as part of the Dnepropetrovsk Sputnik programme.

It was a 400 kilograms (880 lb) spacecraft,[1] which was built by the Yuzhnoye Design Bureau, and was used to investigate cosmic rays and flows of charged particles in the Earth's magnetosphere.

[3] The launch occurred at 21:29:54 GMT on 11 June 1968, and resulted in the successful insertion of the satellite into orbit.

[5] The North American Air Defense Command assigned it the catalogue number 03279.

[7] It completed operations on 29 June 1968, before decaying from orbit and reentering the atmosphere on 2 November 1968.