which scientists refer to as a solar day. The actual number of seconds that a day on Earth lasts is more complicated. The ...

Slightly less than the 24 hours of a solar day (23 hours, 56 minutes, 4.1 seconds). Used in astronomy, sidereal means "when a star crosses the meridian" (the meridian is an imaginary circle around ...

The average year is, in fact, 365.242 days long – just so long as you’re not talking about the sidereal year ... move across the sky in a roughly 365-day march: “Provided we have an accurate ...