1 The mobile service tower is moved back around the Delta 2 rocket during the 24-hour postponement on April 19. Credit: William G. Hartenstein
2 (Stanford University/J. Burns)
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5 Close-up of the Launch Tower at Vandenburg Air Force Base
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19Gravity Probe B Launch Gravity Probe B Launches from Vandenberg AFB. California April 20, 2004 @ 9:57:24 a.m.
20Gravity Probe B Launch Gravity Probe B Launches from Vandenberg AFB. California April 20, 2004 @ 9:57:24 a.m. PST
21Gravity Probe B launch Gravity Probe B Launches from Vandenberg AFB. California April 20, 2004 @ 9:57:24 a.m. PST
22Gravity Probe B launch Gravity Probe B Launches from Vandenberg AFB. California April 20, 2004 @ 9:57:24 a.m. PST
23Gravity Probe B launch Gravity Probe B Launches from Vandenberg AFB. California April 20, 2004 @ 9:57:24 a.m.
24Gravity Probe B Launch Gravity Probe B Launches from Vandenberg AFB. California April 20, 2004 @ 9:57:24 a.m. PST
25Gravity Probe B Pre-launch Gravity Probe B on SLC-2 shortly before it launches from Vandenberg AFB. California April 20, 2004 @ 9:57:24 a.m. PST
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27BOEING DELTA II A Boeing Delta II lifts of SLC 2 from Vanedenberg Air Force Base on Tuesday morning. The payload is the Gravity Probe B. The Gravity Probe B will test two predictions of Albert Einstein's general theory of relativity. Photo by Thom Baur. (AP Wide World out, no resales)