Question 1

What is sidereal time?

Accepted Answer

Time based on Earth's rotation relative to stars. A sidereal day is ~4 minutes shorter than solar.

Question 2

When is sidereal time used?

Accepted Answer

In astronomy to track when celestial objects are visible.

Question 3

How do leap years affect these calculations?

Accepted Answer

Leap years add an extra day (Feb 29) every 4 years, except centuries not divisible by 400. Our calculator accounts for all leap year rules.

Question 4

Which calendar system does this use?

Accepted Answer

This uses the Gregorian calendar (standard worldwide since 1582). For historical dates before adoption, results may differ from Julian calendar dates.

Sidereal Solar Time Tool - Free Online

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