According to conspiracy theorists, the Black Knight satellite is an alien spacecraft orbiting Earth. Here's what's really going on. The Black Knight satellite conspiracy theory claims that a ...

A secret Russian satellite that US officials believe is linked to Russia’s nuclear weapons program appears to be spinning uncontrollably in space in a major blow for Moscow, according to Amer… ...

Plesetsk Cosmodrome in northern Russia during the launch of the Copernicus Sentinel-3 satellite on April 25, 2018. It was also the launch site of the Cosmos 2553 satellite, Stephane Corvaja/Getty ...

The Biomass satellite will measure the trunks, branches and stems of the trees that populate the planet's forests. ESA says these measurements will serve as a proxy for determining carbon storage ...

Another Reddit user suggested the satellite could be a Chinese Earth-imaging spacecraft named Ziyuan 3-02, which was flying in the same area as the Pleiades satellite at the time.