Moon phases occur every 29.5 days due to Sun's illumination. Moon has day and night sides that change with rotation. Moon orbits Earth in elliptical path, completing revolution in 27.3 days
Sky is an unobstructed view from Earth's surface, including atmosphere and outer space. Celestial sphere contains Sun, Moon, planets, and stars. Sky dome appears flatter during day than night
Sunrise occurs when upper rim of Sun appears on horizon in morning. Sunrise occurs when Sun's center is 50 arcminutes below horizon. Timing varies yearly due to Earth's rotation and axial tilt. Sunrises occur approximately due east on equinoxes
Moon completes one revolution around Earth in 29.5 days. Moon phases show how much of its illuminated side is visible. Moon doesn't emit light, reflects sunlight
Andromeda Galaxy is Earth's closest astronomical neighbor. Appears as faint oval in night sky without special tools. Located between Cassiopeia and Pegasus constellations. Two companion galaxies: M32 and NGC 205
Requires 24-inch corrugated paper and two different-sized magnifying glasses. Paper diameter needs to be marked and cut 1.5 inches from mark. Two magnifying glasses are glued together in a tube shape. Images appear larger and upside down. Best suited for viewing moon and Saturn's rings