Quote:
Originally Posted by mbyron
1. Prior to the development of chronometers capable of measuring microseconds, the sidereal second was sufficiently precise.
2. It matches a sidereal second pretty closely. If you're asking why cesium 133, I don't know the answer to that one. Sorry!
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MBryon:
You are my kind of guy: from NE Ohio;
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MTD, Sr.
Youngstown (Ohio) Liberty H.S., Class of 1969
Youngstown State Univ., Bach. of Civil Engr., Class of 1980
Trumbull Co. Bkb. Off. Assn., Member since 1971.