Parallax
In six months the Earth moves around the Sun from 1 to 2.
is small so we can use the approximation
where 1 Astronomical Unit=150 million km, the distance from the Earth to the Sun, andis in radians.
Example
In six months the Earth moves around the Sun from 1 to 2.is small so we can use the approximationwhere 1 Astronomical Unit=150 million km, the distance from the Earth to the Sun, andis in radians.
Example