Starship’s seventh test flight, which had been set for Monday afternoon, has been delayed to Wednesday. The launch window is from 3:45 p.m. to 5:38. p.m.

Blue Origin is planning to launch its reusable heavy-lift New Glenn rocket for its inaugural voyage at 1 a.m. EST Sunday if weather conditions allow it to proceed.

Starship is scheduled to launch from Starbase on Monday (Jan. 13) at 5:00 p.m. EST (2200 GMT). It will be the seventh test flight for the giant rocket, which SpaceX is developing to help humanity settle Mars and achieve a variety of other exploration feats.

SpaceX crews are preparing for the 7th test launch of its Starship mega rocket. The world’s biggest rocket could launch again from SpaceX’s Starbase in Texas at 5 p.m. on Monday. SpaceX said Starship 7 is a “new generation” of its spacecraft that will test significant upgrades.