Last-minute glitch delays launch to sun
A last-minute technical problem Saturday delayed NASA’s unprecedented flight to the sun. The early morning launch countdown was halted with just one minute, 55 seconds remaining, keeping the Delta IV rocket on its pad with the Parker Solar Probe.
Rocket maker United Launch Alliance said it would try again Sunday, provided the helium-pressure issue is resolved. As soon as the red pressure alarm for the gaseous helium system went off, a controller ordered, “Hold, hold, hold.”
Once on its way, the Parker probe will venture closer to our star than any other spacecraft.