Question

What do you mean by sidereal day?

Answer 1

Answer:

• A sidereal day is the time it takes for the Earth to rotate about its axis so that the distant stars appear in the same position in the sky.

• The sidereal day is the time it takes for the Earth to complete one rotation about its axis with respect to the 'fixed' stars.

• On Earth, a sidereal day lasts for 23 hours 56 minutes 4.091 seconds, which is slightly shorter than the solar day measured from noon to noon.

Answer 2

Explanation:

Science, any system of knowledge that is concerned with the physical world and its phenomena and that entails unbiased observations and systematic experimentation. In general, a science involves a pursuit of knowledge covering general truths or the operations of fundamental laws