A Blue Origin New Glenn rocket sits on its pad November 8, prepared to launch NASA's Escapade Mars mission from the Cape Canaveral Space Force Station in Florida. Joe Skipper/Reuters

New Glenn, the towering orbital rocket that Jeff Bezos’ Blue Origin designed to compete with SpaceX’s dominant Falcon rockets, is back for its second launch ever — this time with a job to send twin spacecraft on a long, winding trip to Mars.

The towering, 322-foot (98-meter) rocket is set to take off from Cape Canaveral Space Force Station in Florida during an 88-minute launch window that opens at 2:45 p.m. ET on Sunday. Blue Origin will have a livestream of the event on its company site.

Weather may prove to be an issue, as forecasters have predicted a 35% to 45% chance that conditions will not be cl

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