Kvant-1

{| class="toccolours" style="width: 25em; float: right; clear: right; margin: 0 0 1em 1em;" |+ style="margin-left: inherit; font-size: larger;" | Kvant-1 Module (Mir) |- |colspan="2" style="text-align: center;" |200px|Kvant-1 in 1995Kvant-1 in 1995 |- !colspan="2" style="text-align: center; background: #FFDEAD;" | Module statistics |- |Mission name||Mir |- style="vertical-align: top;" |Launch||March 31, 198700:06:16 UTCLC-200/39, Baikonur Cosmodrome, USSR |- style="vertical-align: top;" |Launch vehicle||Proton-K |- style="vertical-align: top;" |Docked||April 9, 198700:35:58 UTC |- style="vertical-align: top;" |Re-entry||March 23, 200105:50:00 UTC |- style="vertical-align: top;" |Time in Orbit||5106 days, 5 hours |- style="vertical-align: top;" |Length||5.3 m |- style="vertical-align: top;" |Diameter||4.35 m |- style="vertical-align: top;" |Launch Mass (includes FSM):||20,600 kg |- style="vertical-align: top;" |Module Mass||11,000 kg (at launch) |- style="vertical-align: top;" |FSM Mass||9,600 kg (at launch) |- style="vertical-align: top;" |Habitable volume||40 m3 |} Kvant-1 (; English: Quantum-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. It was used to conduct research into the physics of active galaxies, quasars and neutron stars and it was uniquely positioned for studies of the Supernova SN 1987A. Furthermore, it supported biotechnology experiments in anti-viral preparations and fractions. Some additions to Kvant-1 during its lifetime were solar arrays and the Sofora and Rapana girders.