A new version of SpaceX's mammoth Starship rocket, featuring multiple upgrades, more powerful engines and major safety enhancements is poised for blastoff Thursday in a critical milestone for Elon Mus...

Elon Musk's SpaceX has postponed a launch of its massive Starship rocket and said it plans to make another attempt at the highly-anticipated test flight on Friday.

“For those who think this is simply another repeat test flight, the engineering changes under the rocket ‘hood’ are substantial,” Joseph Gonzalez, an associate professor of practice in aerospace engin...