Orbit of the Earth

Wednesday, November 24, 2021

Are you aware that there are actually three methods for measuring how long it takes for the earth to revolve around the sun?

The Earth revolves in a counterclockwise direction around the Sun.

clockwise and counter-clockwise
It also orbits in a prograde manner which means it revolves and rotates in the same direction.

There are actually three methods of measuring how long it takes the Earth to revolve around the Sun.

First, there is the sidereal method  One complete orbit takes 365.256 days during which time
the Earth has traveled 940 million km (584 million mi) and measures a complete revolution around the sun compared to the stars

Another method is called the tropical method  A tropical year is 365.24219 days and is the time from one vernal equinox to the next.

An anomalistic year is 365.259636 days and is the time from perihelion to perihelion 
The perihelion is the point in the orbit of a planet, asteroid, or comet at which it is closest to the sun

The Earth’s orbital speed around the sun is about 67,000 mph (107,000 km/h).

There is one slight problem with this orrery it shows the Earth traveling in a circle however the Earth's orbit is an ellipse and the earth has an average distance of 149.60 million km (92.96 million mi) from the sun.


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