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