We'll have to wait a little longer to see Virgin Galactic's third spaceflight.
The company had been targeting tomorrow (Feb. 13) for the next crewed test flight of its latest suborbital SpaceShipTwo vehicle, VSS Unity. But that's not going to happen.
"Flight test update: We have been progressing through our pre-flight preparations and, during that process, we have decided to allow more time for technical checks. We are working to identify the next flight opportunity," Virgin Galactic representatives announced via Twitter today (Feb. 12).
There are additional launch opportunities for the test flight — which will carry two pilots, no passengers and some research payloads manifested via the NASA Flight Opportunities program — throughout February, the company said in a Feb. 1 update.
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Unity's first two spaceflights, in December 2018 and February 2019, took off from California's Mojave Air and Space Port, near the headquarters of Virgin Galactic's manufacturing subsidiary, The Spaceship Company. But the upcoming third flight will lift off from Spaceport America in New Mexico, Virgin Galactic's commercial hub. It will be the first crewed space mission ever to launch from the state.
Unity has already tried once to make spaceflight number three. But the space plane's rocket motor failed to fire properly during that first attempt, on Dec. 12, 2020, and pilots C.J. Sturckow and Dave Mackay brought Unity down for a premature but safe landing at Spaceport America. (SpaceShipTwo takes off beneath the wings of a carrier plane, then makes its own way to suborbital space after being dropped at an altitude of about 50,000 feet, or 15,000 meters.)
The issue that caused the Dec. 12 abort — a bad connection in the computer that controls Unity's propulsion system — was soon identified and rectified, and Virgin Galactic started prepping the vehicle for another attempt.
Mike Wall is the author of "Out There" (Grand Central Publishing, 2018; illustrated by Karl Tate), a book about the search for alien life. Follow him on Twitter @michaeldwall. Follow us on Twitter @Spacedotcom or Facebook.