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Johannes Kepler discovered that the Earth revolves/orbits the Sun in an ELLIPSE.

He also discovered that the Sun is NOT at the centre of the ellipse, but at one of the foci ; (plural of focus). The other focal point being 'blind'.

From this we have the definition, that as the Earth orbits the Sun , 'It sweeps equal arcs in equal times'.

As the Earth orbits, it speeds up and slows down. It is moving at its fastest when passing the Sun at it nearest point ( perigee) and slowest when at its furthest point ( apogee).

Have a look in Wikipedia under' Johannes Kepler.

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lenpollock

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Related Questions

What is the distance between planet earth and planet Kepler?

There is no planet Kepler. Designations such as Kepler-69c are given to planets discovered by the Kepler spacecraft. This spacecraft has discovered planets ranging from 100 to 7,000 light years away.


What is the orbit of a planet?

An ellipse. (Kepler's first law of planetary motion) Since the plants do not orbit in a perfect circle. They orbit in a oval shape.


Who discovered planet Kepler?

The Kepler Space Observatory, named after astronomer Johannes Kepler, was launched by NASA in 2009 to search for exoplanets. The telescope discovered thousands of new planets using the transit method, where a planet passing in front of its star causes a temporary decrease in brightness.


Kepler discovered that the orbit of each planet is a?

Ellipse.


Who is bigger planet earth or planet Kepler?

There is no single planet named Kepler, rather it is part of the designation given to planets discovered using the Kepler telescope. Most of the planets discovered using the telescope are larger than Earth, but some are smaller.


Kepler discovered that the orbit of each planet is a rather than a circle - true or false?

The question cannot be answered because the key word is missing.


Is there a planet called Kepler?

No. There are, however, many planets discovered by a spacecraft called Kepler and given designations such as Kepler-69c.


Kepler discovered that the orbit of each other planet is?

He discovered that avery planet has a ellipcial orbit, which means oval.


What shape of a planet orbits discovered by Kepler?

The shape is an "ellipse".


What is the diameter of the planet kepler?

There are lots of planets in the Kepler series. To answer your question, we need to know to which number Kepler you are asking about.


Does the planet Kepler really exist?

There is a bit of confusion here. Kepler is not the name of a planet but of a space telescope used to discover planets in other solar systems. Planets discovered with this telescope are given designations such as Kepler-22b. This telescope has been used to discovered hundreds of planets.


How was the planet Kepler 22b named?

Kepler-22b was given its the designation Kepler as it is one of many planets discovered by the Kepler observatory. The 22b refers to it being the innermost (and only known) planet orbiting the star Kepler-22.