A curious paradox with reference to binary stars has recently come to light.
But it has been recently found that in some binary stars the fainter component has actually the larger mass!
From these data it is possible to build up in outline the probable history of binary stars.
Binary stars were incidentally discovered by Sir William Herschel.
Binary stars consist of two suns which revolve round their common centre of gravity, and form real dual systems.
The proper motion of the stars and the movements of revolution of the binary stars constitute the real movements of these bodies.
But till these binary stars were discovered we had no means of guessing that this law had any force beyond our own solar system.