Millons of stars are traveling about in space.A few form groups which journey together,but most of them travel alone .And they travel through a universe so large that one star seldom comes near to another .For the most part each star makes its journey in complet loneliness,like a ship on an empty ocean.The ship will be well over a million miles from its nearest neighbor.From this it is easy to understand why a star seldom finds another anywhere near it.
We believe,however,that about two million years ago,another star wandering through space,happened to come near our sun just as the sun and the moon raise tides on the earth,so this star must have raised the surface of the sun.