IN these days of accurate clocks and watches no one thinks of using a sun dial to tell the time of day. At best such an instrument can be right but four times a year, and in many places it can ...

If you move West from that point, the Sun will be lower in the sky at ... But you need a very accurate clock to make the first measurement. This guy is our guy. You have to sympathize with ...

These optical clocks are still in the testing phase, but some of them are already a hundred times more accurate. This is why they are to become the basis for the global definition of seconds in the ...

If you buy through a BGR link, we may earn an affiliate commission, helping support our expert product labs. Scientists from MIT have developed what they believe is the most accurate atomic clock ...

On the first page of “The Clock in the Sun,” the astrophysicist Pierre Sokolsky admits that he is “neither a specialist in solar physics and astronomy nor a historian of science.” ...

These optical clocks are still being assessed, but already now, some are 100 times more accurate than cesium clocks. They will therefore become the future basis for the worldwide definition of the ...