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UT1

What does UT1 stand for?

UT1

Which field of study commonly uses UT1?

Astronomy

Who introduced UT1?

Pierre-Simon Laplace

Which country's observatory is used to determine UT1?

England

In which year was UT1 first calculated?

1944

UT1 is the time scale based on the rotation of which celestial body?

Earth

What is the purpose of UT1?

Timekeeping

Which organization maintains the UT1 time scale?

USNO

How often does the UTC - UT1 differ by a whole second?

Every year

What kind of time scale is UT1 considered to be?

Solar time scale

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