As observed from the earth, the sun appears to move an approx. circular orbit. For the motion of another planet like mercury as observed from the earth, this would

As observed from the earth, the sun appears to move in an approximate circular orbit. For the motion of another planet like mercury as observed from the earth, this would

The earth like other planet was formed from-

To an observer on the earth the stars appear to twinkle. This can be ascribed to

To an observer on the earth the stars appear to twinkle. This can be ascribed to

A total solar eclipse is observed from the earth. At the same an observer on the moon views the earth. She is most likely to see (E denotes the earth)

The earth, moving around the sun in a circular orbit, is acted upon by a force and hence work must be done on earth by this force.

The earth, moving around the sun in a circular orbit, is acted upon by a force and hence work must be done on earth by this force.

Assume that the earth moves around the sun in a circular orbit of radius R and there exists a planet which also moves around the sun in circular orbit with an angular speed twice as large as that of the earth. The radius of the orbit of the planet is