The company, started by the Amazon founder Jeff Bezos, reset its countdown clock repeatedly over a period of just over two hours before eventually postponing the test flight to another day.

Jeff Bezos' Blue Origin filled its New Glenn rocket with propellants on Thursday morning for its debut launch from Florida, the company's second attempt this week to get the rocket in space and kick start its rivalry with SpaceX in the satellite launch market.

Blue Origin officials hope to send their heavy-lift New Glenn rocket on its unmanned maiden voyage into space after 1 a.m. EST, with the mission's goal being to reach orbit before returning to Earth.