AST101H1 Chapter Notes - Chapter 2.3: Ecliptic, Full Moon, New Moon
18 Apr 2018
School
Department
Course
Professor
23
AST101H1 Full Course Notes
Verified Note
23 documents
Document Summary
Sun hits the earth and moon at the same angle. Half the moon is always illuminated by the sun, but the amount we see depends on the moon"s position in orbit. Phase is related to time it rises, reaches highest point, and sets. Moon rotates on axis in same amount of time it takes to orbit earth --> see the same face of the moon. Total lunar eclipse: sun/moon/earth are perfectly aligned, moon passes through earth"s umbra. Can only be see in certain areas of planet. Total solar eclipse: moon"s umbra covers part of earth"s surface if the. Annular: moon is farther, ring of sunlight around the moon. Partial solar: only part of the sun is blocked. Umbral shadow traces a narrow path across earth. Moon"s orbit is slightly inclined to ecliptic plane. Crosses plane two times, once going in and once going out - nodes Saros cycle: 18 years 11 1/3 days, combination of seasons and lunar cycles.
