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Talk:Theory of relativity (view source)
Revision as of 16:47, August 5, 2007
, 16:47, August 5, 2007Nasa on spacecraft and relativity
:: Andy, I don't get the point of your edits. Under Ostensible Paradoxes, you have a 2001 article that says "If confirmed, the finding could mean ...". That was 6 years ago. Was it confirmed, or not? The following results are somewhat interesting, but obscure. [[User:RSchlafly|RSchlafly]] 13:14, 4 August 2007 (EDT)
:: Andy, I don't get the point of your edits. Under Ostensible Paradoxes, you have a 2001 article that says "If confirmed, the finding could mean ...". That was 6 years ago. Was it confirmed, or not? The following results are somewhat interesting, but obscure. [[User:RSchlafly|RSchlafly]] 13:14, 4 August 2007 (EDT)
== Nasa on spacecraft and relativity ==
Three of the items found with a quick search:
* Cassini refines measurements of general relativity with its trip around the sun [http://saturn.jpl.nasa.gov/news/press-releases-03/20031002-pr-a.cfm]
* Voyager 1's slingshot around Saturn showed frequency shifts in agreement with relativity [http://www.newscientist.com/article/mg12517102.600-science-encounter-with-saturn-confirms-relativity-theory.html]
* Gravity Probe B is a satellite launched and demonstrates frame dragging and geodetic warping of space [http://www.nasa.gov/mission_pages/gpb/index.html][http://einstein.stanford.edu/]
Given these examples, I believe the passage recently added:
:In addition to GPS discussed above, NASA has launched numerous space probes and missions, but none of them have ever used the theory of relativity in their timing mechanisms even though they experience much weaker gravitational fields in space.
is inappropriate and misleading. Even if the space craft where not ''designed'' with relativity in mind (the Gravity Probe B certainly was designed with it in mind), Voyager and Cassini and others demonstrated the effects of relativity as they dipped into gravity wells and out of them with the frequency of the signal being sent to Earth. --[[User:Rutm|Rutm]] 12:47, 5 August 2007 (EDT)