Kvant-1 (Russian: Квант-1; English: Quantum-I/1) (37KE) was the first module to be attached in 1987 to the Mir Core Module, which formed the core of the Soviet space station Mir. It remained attached to Mir until the entire space station was deorbited in 2001.The Kvant-1 module contained scientific instruments for astrophysical observations and materials science experiments.