The Stars in Their Courses

actually Alpha already amount Andromeda appears arrangement astronomers atmosphere atoms Beta body bright brightest star calculate candle-power centre clouds colour comes compared completely consists constellation contains continually course dark described direction discovered distance earth electrons exactly faint fall further gives globular clusters gravitational pull greater heat huge inch inside Jupiter known less lies light London look Mare Imbrium matter means measure Mercury miles Milky million moon motion move nearest nearly nebulae night objects Observatory observed once ordinary Orion pass path photographed planets Plate Pole present probably proves radiation reach reason Region represent round seems seen shape shewn shews similar Sirius solar space speed star-cities substance sun's surface telescope temperature thousands turn universe Venus weight whole