Explain this common observation clearly : If you look out of the window of a fast moving train, the nearby tress, houses etc. seem to move rapidly in a direction opposite to the train's motion, but the distant objects (hill tops, the Moon, the starts etc.) seem to be stationary. (In fact, since you are aware that you are moving, these distant objects seem to move with you).

Explanation

The line joining the object to the eye is called the line of sight. When a train moves rapidly, the line of sight of a
near by tree changes its direction of motion rapidly. Therefor, the trees appear to run in opposite direction.
On the contrary, the line of sight of far off objects (hill tops, the moon, the stars etc.) does not change its
direction so much due to extremely large distance from the eye. Hence, distant hill tops. moon, the stars
etc. appear stationary.