0
"Sidereal" time is based on the stars.
The Earth actually turns 360 degrees in 23 hours, 56 minutes and a few seconds. So why do we say that a "day" is 24 hours?
Because in the 23 hours and 56 minutes that it takes the Earth to rotate once, the Earth has moved in its orbit so far that it takes another 4 minutes for the Earth to turn enough to point to the Sun again.
Wiki User
∙ 15y ago
Add your answer:
Earn +20 pts
What is time based on the sun called?
Apparent Solar time..
The smallest stars are called what stars?
They are called Core Burning Stars the smallest one is OGLE-TR-122b.
What is a forecast of a person's future based on positions of the planets and stars at a given moment?
It is called a "horoscope", and is created as part of the practice of astrology.
Patterns of stars are called what?
Patterns of stars are called constellations.
What are small red stars called?
Small red stars are called red dwarves. They are the least luminescent and coldest stars.
How sumerians keep time?
They invented a calender based on the moons and stars
What happen when stars age?
As with everything, stars age as well, and reach the end of their time. As stars age, they become different types of stars, based on how big they are, and how hot they are burning. When they run out of fuel, they eventually die.
What is time based on the sun called?
Apparent Solar time..
What is time called that is based on the average length of a day throughout a year?
Mean solar time
The smallest stars are called what stars?
They are called Core Burning Stars the smallest one is OGLE-TR-122b.
What is a forecast of a person's future based on positions of the planets and stars at a given moment?
It is called a "horoscope", and is created as part of the practice of astrology.
What is the forecast of a persons future based on stars at a given moment?
That's called astrology and it is a type of superstition rather than a science.
What was the Sumerian clock called?
They invented a calender based on the moons and stars
Patterns of stars are called what?
Patterns of stars are called constellations.
What is time called that is based on the average of a day throughout a year?
Mean solar time
What is this improved the ability to determine latitude and longitude based on the altitude of stars?
what improved the ability to determine latitude and longitude based on the stars
What are the movements of the Earth based upon the perceived changes in positions of the stars?
The "sidereal day" and the "sidereal year". The sidereal day is the time taken for Earth to rotate once, measured against the background of stars. Stars are very distant, so it means we get an accurate measure of the rotation time. The day of 24 hours is based on Earth's rotation relative to the Sun. That doesn't give the "true" rotation time, but it's very convenient in daily life, of course.
