Copied Celestial Star Globe
Celestial Star Globe
The Celestial Globe is a demonstration device that shows the apparent positions of the stars visible from Earth. The three dimensional representation allows the relative angular positions of the constellations to be visualized and permits students to estimate which stars will be visible from different places on Earth for any rotational position of the planet. The globe consists of two concentric spheres mounted on a common axle and supported on a frame with a base. The inner sphere in the above illustration) is 4" in diameter and represents the Earth. The continents are marked on it in their correct relative positions. The outer sphere is transparent. It is 12.5" in diameter and has the constellations and their stars marked on it. Yellow shading indicates the Milky Way, the plane of galaxy. The axle that carries both spheres allows them to be rotated independently. An angle scale is marked on the frame that supports the axle. The angles are marked every degree and extend from zero at the equator to 87° in both directions. The frame is fixed to a round base so that the axle is held at an angle of 23.5° to the vertical, representing the inclination of the Earth's spin axis to the axis of its orbit around the sun.
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BEST PRICE 1 Product Purchase
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