answersLogoWhite

0

A planet's orbit is the path it takes as it travels round the Sun.

Johannes Kepler discovered that each planet moves in its own elliptical obit. For seven of the eight planets (leaving out Mercury) the elliptical orbits are very nearly circular, which is why it took 1500 years to develop measurement techniques accurate enough to enable Kepler to make his discovery.

However for all the planets the Sun is some appreciable distance from the centre of the circle, and in the Earth's case it is 2½ million kilometres from the centre so that the distance varies between 147.1 and 152.1 million kilometres (closest in January each year).

User Avatar

Wiki User

10y ago

What else can I help you with?