The next test flight of the SpaceX Starship rocket could launch as soon as today. If there aren't any delays, the massive 400-foot rocket could lift off this evening from the SpaceX Starbase near Brownsville. This comes nearly a month after the latest test flight of the Starship rocket, which is expected to aid NASA in its upcoming lunar missions. That test was the first time the company successfully "caught" the booster rocket as it descended to the ground after detaching from the Starship rocket.