In early December, 2018, SpaceX successfully ferried 2.5 tonnes of supplies to the the orbiting laboratory, including materials to support 250 experiments on its Dragon spaceship. However, while Dragon was latching onto the ISS to deliver the supplies, eagle-eyed viewers believe they spotted something in the distance. As seen on a NASA live feed from the ISS, what looks like three red lights in a triangular formation appear to slowly move by in the background.