Show Cannot See Two hundred millions of millions of miles mD away Is la a star itar called AlgoL It It U II the second b brightest star Itar In the constellation con of Perseus and It has the curious habit of varying In IIi brightness at regular Intervals After much research we know now DOW that Algol consists of two stars stars one one bright the other dark The They are each about a million i miles In diameter and about two million miles mites apart They ren revolve lve around one another and when the dark star la Sa between us and the bright one the light we receive from the latter diminishes There are several other stars star of the Algol type and It Is U simply through our researches that we are aware that there exist In the heaven beaven dark stars stare stars stars stare which give no DO light at t all aU and are In themselves totally Invisible How Bow man many there may mar be we do not know for It Is only by their power loer of eclipsing bright stars stare that we can reo- reo them at all aU |