During SpaceX's historic Starship orbital flight, a mysterious blue streak on the livestream sparked viral UFO theories on X (formerly Twitter). Experts and Grok clarified it was residual exhaust gas ...

A mysterious object was seen on SpaceX's livestream of its Starship rocket on Monday. Many viewers suggested it was a UFO, with some saying it was the size of a mothership.

Viewers watching SpaceX's live feed of the latest Starship launch claim to have spotted a "city-sized" alien mothership in the background ...