Finding:

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   Gravity Probe B

   Gravity Probe B (GP-B) is a satellite-based mission which launched in 2004. ... Gravity Probe B web site at NASA
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   Introduction to general relativity

   It is due to be tested by the Gravity Probe B satellite experiment launched in 2004, with results expected in late 2008. ... Lochner, Jim, ed. (2007), "Gravitational Lensing", Imagine the Universe website (NASA GSFC), < http://imagine.gsfc.nasa.gov/docs/features/news/grav_lens.html>.
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   Frame-dragging

   The Gravity Probe B experiment is currently under way to experimentally measure another gravitomagnetic effect, i.e. the Schiff precession of a gyroscope, to an expected 1% accuracy or better. ... NASA RELEASE: 04-351 As The World Turns, It Drags Space And Time
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   Gravity Probe B mission timeline

   Analysis team realised that more error analysis, particularly around the Polhode motion of the gyros, was necessary than could be done in the time to April 2007, and applied to NASA for an extension of funding to the end of 2007. ... Gravity Probe B
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   Gravitomagnetism

   Gravity Probe B ... In Search of gravitomagnetism, NASA, 20 April 2004.
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   Gravity Probe A

   It was launched on June 18, 1976 on top of a Scout rocket and remained in space for 1 hour and 55 minutes, as intended. ... Gravity Probe B
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   List of Solar System probes

   | Galileo | NASA | 10 February 1990 | flyby | success | gravity assist en route to Jupiter; minimum distance 16,000 km | | | ... "Solar Probe" (pdf).
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   Wernher von Braun

   But well before the moon flight was launched, NASA was casting eyes on targets far beyond the moon. ... Space Shuttle Propulsion · International Space Station · Chandra X-ray Observatory · Gravity Probe B · Project Constellation · Ares I · Ares V · Orion
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   2004 in science

   April 20 - NASA launches Gravity Probe B in an effort to test Einstein's general theory of relativity. ... June 21 - SpaceShipOne, the first civilian space ship is launched in California, reaching an altitude of 100 km (62.5 miles), just passing the edge of space.
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    NASA

    The Cassini probe, launched in 1997 and in orbit around Saturn since mid-2004, is investigating Saturn and its inner satellites. ... One ex-USN C-9B was taken in hand in 2005 to replace the famous KC-135s used in NASA's Reduced Gravity Research Program.

Explore the following pages on Powerset:

• Gravity Probe B,
• Introduction to general relativity,
• Frame-dragging,
• Gravity Probe B mission timeline,
• Gravitomagnetism,
• Gravity Probe A,
• List of Solar System probes,
• Wernher von Braun,
• 2004 in science,
• NASA