Why do aeroplanes apear to be stationary from a moving object on the ground ?

Answer 1

It is called 'Frame of Reference.'

When you are standing on the ground, the frame of reference is not moving and it is easy to see other things that are or are not moving.

When you are in a moving object, your frame of reference is moving, and other things seem to be not moving - even when they are moving. It takes a large change in position to identify something as moving, when you are in a moving frame of reference. Especially things that are far away, such as an aeroplane, seem to be stationary.

In reality, everything is moving. The Earth is going through space in its orbit of the sun, but the Sun is moving through space in its orbit of the Milky Way, But the Milky Way is moving through space in its orbit of the Galactic Cluster which is also moving through space. All in all, the Earth is traveling about 600 kilometers each second. But since we are on Earth and it is our primary frame of reference, we don't notice this motion at all.

;-D If it took you 1 minute to read this, you have traveled 36,000 kilometers! did you feel it? No. oh well.

Answer 2

It's called the Parallax Effect. It also works with the moon.