UPDATE:
SpaceX successfully launched its Starship Tuesday night at 6:30 p.m. from its Starbase in South Texas.
This was a Starlink simulator payload practice operation, where dummy Starlink satellites were deployed from the Starship.
Watch the launch here:
SpaceX successfully launches Starship megarocket Tuesday night in test flight
ORIGNAL:
SpaceX is attempting its third launch of the Starship Tuesday night, after Monday night's launch was postponed due to weather in the area.
The launch window opens up around 6:30 p.m.