Minotaur l launches with STP-R1 from Vandenberg AFB. 09-22-2005
Minotaur l rocket soared off its launch pad at 7:24:29 p.m. PDT ( 0224:29 GMT) from Vandenberg Air Force Base in California carrying an experimental military spacecraft.
The Minotaur's ascent to reach the desired orbit around Earth was timed perfectly to produce a spectacular "twilight phenomenon" that occurs when rockets or missiles are launched just before sunrise or shortly after sunset. Unburned fuel particles and water drops in the rocket's contrail freeze in the less dense upper atmosphere and get reflected by sunlight at high altitudes to generate such breath-taking scenes. The winds aloft twist the exhaust cloud, giving it a corkscrew effect.
Vandenberg Air Force Base, positioned along the Pacific coastline 140 miles northwest of Los Angeles, has hosted more than 1,700 launches since December 1958. But only a fraction of the flights have displayed such a spectacle. 09-22-2005
Read MoreThe Minotaur's ascent to reach the desired orbit around Earth was timed perfectly to produce a spectacular "twilight phenomenon" that occurs when rockets or missiles are launched just before sunrise or shortly after sunset. Unburned fuel particles and water drops in the rocket's contrail freeze in the less dense upper atmosphere and get reflected by sunlight at high altitudes to generate such breath-taking scenes. The winds aloft twist the exhaust cloud, giving it a corkscrew effect.
Vandenberg Air Force Base, positioned along the Pacific coastline 140 miles northwest of Los Angeles, has hosted more than 1,700 launches since December 1958. But only a fraction of the flights have displayed such a spectacle. 09-22-2005
Minotaur l Vandenberg AFB. 09-22-2005
