AST 111 Lecture Notes - Lecture 4: Blue Moon, Pitha, Lunar Phase
AST 111- Lect 4: Eclipses and the Motion of the Moon
-Each phase of the moon has a different, unique name
-the second full moon in a month is called the “blue moon”
- Not based in history
- Relatively recent
- Start of the term is fuzzy
- No references before 1937
-Quiz Review
- Every star lies somewhere within the definite boundaries of a constellation
- East to West motion of objects in the night sky is caused by the rotation of the
earth
-The phases of the moon are caused by its orbital motion
- A phase of the moon is how much is being lit up nightly
oThe moon is light by the sun
- What are the phases?
oThe process is called Lunation
o
oWaxing Quarter AKA First Quarter
oWaning Quarter AKA Last/Third Quarter
oWaxing is the first half of the cycle when we see more and more of the
moon per night
oWaning is the second half of the cycle when we see less and less of the
moon per night
oThe cycle of the moon takes approx. 29.5 days to complete
This period is called the synodic period
Document Summary
Ast 111- lect 4: eclipses and the motion of the moon. Each phase of the moon has a different, unique name. The second full moon in a month is called the blue moon . Every star lies somewhere within the definite boundaries of a constellation. East to west motion of objects in the night sky is caused by the rotation of the earth. The phases of the moon are caused by its orbital motion. A phase of the moon is how much is being lit up nightly: the moon is light by the sun. This period is called the synodic period: the moon takes 27. 3 days to make a revolution around the sun. Called the sidereal period: note: the synodic period of the moon is longer than the sidereal period. The moon machine demonstrates the relationship between three parameters: the time of day, the lunar phase, the moon"s direction in the sky. *fill out the using the moon machine worksheet*
