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4
EVOLUTION OF WORLDS
Algol is no solitary specimen of a mind-seen invisible star. Many eclipsing binaries of the same class are now known; and considering that the phenomenon could not be disclosed unless the orbital plane of the
Algol and its dark companion,
As seen from the Earth,
as seen from above orbit.
pair traversed the observer's eye, an unlikely chance in a fortuitous distribution, we perceive how many such in truth there must be which escape recognition for their tilt.
But if dark stars exist in connection with lucent ones,
