This friendly book not only points out the constellations but enables the reader to see the relationships among constellations. With simple star maps to orient the reader, the book begins with a section on measuring distances in the sky, star brightness and life in the heavens. From there, the walk begins moving from constellation to constellation using beautifully detailed illustrations. Ancient myths and legends of the sky and a constellation index are also included. No equipment is needed to use this practical guide apart from normal sight and clear skies.
Students investigate light and color using diffraction gratings and color filters.
With color filters, they decipher and create secret messages. A background section plus concise information on color, light, and how the eye and brain sense and comprehend color is included. Also included is a class set of red and green filters and diffraction grating. In this unit of 4 activities, students will use two lenses to create optical instruments and find out how lenses are used in magnifiers, simple cameras, telescopes, and slide projectors. Focussing on physics, optics, and light, this guide is a great companion to the GEMS guide Color Analyzers.