Question

distinguish between sidereal day and solar day .

Answer 1

Sidereal Time. Sidereal time is time kept with respect to the distant stars. Because the Earth moves in its orbit around the Sun, the Earth must rotate more than 360 degrees in one solar day . A solar day lasts from when theSun is on the meridian at a point on Earth until it is next on the meridian

Answer 2

A solar day is the time it takes for the Earth to rotate about its axis so that the Sun appears in the same position in the sky. The sidereal day is ~4 minutes shorter than the solar day. The sidereal day is the time it takes for the Earth to complete one rotation about its axis with respect to the 'fixed' stars.