The mystery of the heart-shaped spot gliding around the ISS station

A strange bright spot suddenly appeared on the international space station ISS is causing a stir.

Picture 1 of The mystery of the heart-shaped spot gliding around the ISS station
Strange light spot by Streetcap 1 returned on June 1, 2016 at the ISS International Space Station at the Earth's orbit.(Image source: Ufosightingsdaily).

Picture 2 of The mystery of the heart-shaped spot gliding around the ISS station
Spooky specks of light appear very close to the ISS at a distance of several hundred meters, this light spot has a strange red and pink color and flashes continuously.(Image source: Ufosightingsdaily).

Picture 3 of The mystery of the heart-shaped spot gliding around the ISS station
Enlarging this bright red spot, we can see it in a rounded edge-like heart and about the size of a motorcycle.(Image source: Ufosightingsdaily).

Picture 4 of The mystery of the heart-shaped spot gliding around the ISS station
Scientists could not determine the origin of the strange heart-shaped pink red spot circling the ISS in essence and where it came from.(Image source: Ufosightingsdaily).

Picture 5 of The mystery of the heart-shaped spot gliding around the ISS station
It is currently an astronomical object that is causing a strong debate among the network community.(Image source: Ufosightingsdaily).