03- Cycles of Moon, Orbital Elipses, and Ecplipses Flashcards
Four Facts about the Moon
- The Moon orbits eastward once a month around the earth
- Its always the same side of the moon that faces the earth
- The changing shape is by sunlight illuminating different parts of the moon
- The moon phase cycle is 29.5 days
Waxing Crescent, First Quarter, Waxing Gibbous, Full Moon, Waning Gibbous, Third Quarter, Waning Crescent, New Moon
Lunar Phase Cycle
Claim that can be tested against reality with observation and experimentation
Hypothesis
System of rules and principles applicable to many situations
Theory
Many tests and refinement that confirms such that great confidence as fundamental principle
Law
List Law, Hypothesis, and Theory in order from least to most reliable/valid
- Hypothesis
- Theory
- Law
- Plane orbits are ellipses
- line from planet to the Sun sweeps over equal areas in equal periods
- planet’s orbital period squared is proportional to its average distance from the sun cubed
Kepler Laws of Planet Motion
a closed curve about two foci. Explains why planets don’t travel in perfect circles around the sun.
Elipses
moon passes between earth and sun, always at new moon, and the moon blocks the sunlight.
Solar Eclipse
Moon moves through the shadow of the earth. The earth blocks the sunlight.
Lundar Ecplise
What is the Umbra and Penumbra (solar eclipse)
Umbra is the totally shaded area of shadow (total solar eclipse) while the penumbra is the partly shaded shadow region.
18 years 11 and 1/3 day pattern of solar and lunar eclipses due to the moon tip of 5 degrees to the ecliptic.
Saros Cycle
Ecplises where the solar photosphere is visible
Annular Ecplise