Aldebaran, a star in taurus constellation is currently in its red giant phase. In a red giant phase we understand that expansion of such a star is resulted from lack of continuous energy source to keep its gravitational force from collapsing. Such a star will become so large that the radius and luminous intensity will increase tremendously. Now, if one day our own solar sun energy source is exhausted and a consequent puffing out, our planet earth will move farther away from the present position by about 70% to balance the gravitational radius. How can we reconcile the notion that a galaxy called Aldromenda which is on a collision path with the earth in possibly about 5billion years to come and the prediction of sun red giant phase in possibly about 4.5billionyears time....... I reasoned that, the planet earth would have gone out of the collision course with aldomenda. Open for discussion.