Update: Blue Origin has postponed the launch indefinitely due to "highly elevated solar activity," the company said in a social media post. The next opportunity for a launch window is being assessed.

SpaceX's latest test of Starship, its gargantuan next-generation megarocket, ended with the upper stage dramatically ...

Bezos' New Glenn and Musk's Starship both are heading for launch, and both could lift off in close timing to each other. Here's what we know.