Russia Just Reactivated 3 Mystery Satellites - And We Still Don't Know Why They Exist

Three Russian satellites that were sent into low orbit in 2013 are on the move again, and no one knows what they are for, The Daily Beast reports. Having been idle for more than a year, one of the satellites went hundreds of metres off its orbit last month to within 1,200 metres of a piece of a Chinese weather satellite that China smashed in a 2007 anti-satellite rocket test. The manoeuvre, which is pretty impressive for such a small spacecraft, is also rather close by orbital standards. More

(Source: ScienceAlert.com - May 22)