Sun : Nucleus, Planets : ________.

The orbit of a planet is an ________________ with the Sun at one of the foci.

The orbit of a planet is an ellipse with the Sun at one of the ___________.

I convert the Sun.s energy into food for the plant. Who am I? ________

The Stars and the sun are __________ .

The weight of a body is measured on planet Earth as M . When it is taken to a planet of radius half that of the Earth then its value will be ___________ .

The straight line joining the planet and the Sun sweeps equal_________ in equal interval of time.

The study about stars and planets are known as _____.

According to Kepler's planet move in