Transparent Celestial Star Globe Basic 12 Inch

Study the stars with your own planetarium! This unique globe clearly and simply demonstrates the apparent relationship between Earth and the stars, planets, galaxies and other celestial objects in the universe. Globe can be set to reflect constellation position according to time and place to show the actual positions of the stars. Globe has been printed on the inside so that a crayon may be used to mark positions of the planets or the moon. 12 Inch Diameter.

Includes a detailed Study Guide.

Measurements are approximate.

SET-UP:

The Celestial Globe is designed to properly illustrate the relationship of what someone on Earth would see when they look up to the sky. Imagined that you are tiny person standing on the surface of the Earth sphere under the clear globe. Everything is relative to that specific point of view . In other words, the globe is constructed such that if you point it North, set the date and time, then look through the globe , the constellations you will see through the globe are the same ones you will see up in the sky. Since everything is relative to the the user, setting up the Celestial Globe for use is actually quite simple. The first step is to orient the tilt of the globe (ie: set the latitude). To set the Globe for a given spot on Earth, just position the sphere and turn the knob until the desired location (North America for Boston) is facing straight up. This will orient the clear sphere properly at the appropriate latitude. Where the stars are at different times is then just a matter of moving the clear globe to the desired time marker. To do that, just set the month of the year. This is done by rotating the clear surface until the desired month marking aligns with the time dial. This has the effect of shifting the clear constellations sphere until the right ones are "up in the sky." With the Celestial Globe properly set up, it can now be used it to visualize all kinds of apparent astronomical movements.