AS101 Lecture 7: AS101 Lecture 7
Document Summary
Depending on the angle between the sun, earth and moon, and observer on earth will see more or less of the light and dark sides of the moon. You see the terminator at different angles (sometimes head on, so it looks like a straight line, sometimes at a slant so that you see it as a curve) New: dark, close to sun, not visible at night. Waxing crescent: less than half lit, east of the sun, visible in the west after sunset. First quarter: western (right) half lit, visible near the meridian at sunset, sets around midnight. Waxing gibbous: more than half lit, visible in the east after sunset, sets after midnight. Full: opposite side of the sky from the sun, rises near the sunset and visible all night. Waning gibbous: more than half lit, rises between sunset and midnight. Third quarter: eastern (left) half lit, rises around midnight, near the meridian at sunset.
