HomeSpace ScienceAstronomy Fact of the Day: May 7, 2020Astronomy Fact of the Day: May 7, 2020 Soyuz T-5 spacecraft (foreground) docked with the Salyut 7 space station, as photographed in orbit from Soyuz T-6.Image: Tass/Sovfoto via Britannica Online. On this date in 1984, Progress 21, an unmanned Soviet resupply flight, was launched to the Salyut 7 orbital station.