AST 301 - Moon Phases
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14 Terms
Sidereal Month
The Moon completes an orbit around the Earth every 27.3 days
Synodic/Lunar Month
The Moon returns to its same position relative to the Sun every 29.5 days
Tidal Lock
The same side of the Moon is always visible because it orbits the Earth as fast as it rotates
How often do the Moon phases repeat?
Every 29.5 days
Lunar Eclipse
Sun-Earth-Moon ; The moon takes hours to completely move through the Earth’s shadow
Red Moon
When the Moon appears red in full Lunar eclipse because some light from the Sun is bent through Earth’s atmosphere into its shadow and onto the Moon
What phase is at 6 PM?
First Quarter
What phase is at 6 AM?
Third Quarter
What phase is at 12 AM?
Full Moon
What phase is at 12 PM?
New Moon
What phase is at 3 AM?
Waning Gibbous
What phase is at 9 AM?
Waning Crescent
What is at 3 PM?
Waxing Crescent
What phase is at 9 PM?
Waxing Gibbous
Note 
Flashcards (29)