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- Newsgroups: sci.physics
- Path: sparky!uunet!zaphod.mps.ohio-state.edu!uwm.edu!caen!destroyer!ncar!noao!stsci!scivax!zellner
- From: zellner@stsci.edu
- Subject: Two tracks of time
- Message-ID: <1992Nov9.013839.1@stsci.edu>
- Lines: 20
- Sender: news@stsci.edu
- Organization: Space Telescope Science Institute
- References: <6NOV199215292345@csa1.lbl.gov> <1dhv1tINNrnh@iskut.ucs.ubc.ca> <1992Nov8.174608.24504@CSD-NewsHost.Stanford.EDU> <1dk21rINN5e6@iskut.ucs.ubc.ca>
- Distribution: na
- Date: Mon, 9 Nov 1992 06:38:39 GMT
-
- >
- > I once went to a talk by someone who had worked on especially accurate
- > measures of time, and he remarked that it was conceivable that we
- > could end up at some point in the future with ... two ways of measuring
- > it which were both reasonably consistent with ordinary timepieces, and both
- > self-consistent to ...
-
- I believe we do have two such measures, Atomic Time measured with lasers and
- such and Ephemeris Time measured from the motions and positions of solar-
- system bodies with reference to General Relativity. Atomic time was set
- up to be as consistent with Ephemeris Time as experiment would allow, but
- the ultimate agreement of the two scales in the future is really a matter
- of experiment, right?
-
- If they should be found to run on different tracks, that would no doubt be
- taken to indicate that we need to modify quantum mechanics or general
- relativity, or both.
-
- Ben
-
-