Chapter 26

Front

New Moon

Back

The non-illuminated side faces Earth due to it being located between the Earth and Sun.

Front

Full Moon

Back

All of the illuminated side faces Earth due to it being located on the opposite side of the earth from the Sun.

Front

First Quarter

Back

The half-way point between a New and Full Moon causing the right half of the moon facing Earth to be illuminated. Visible in the evening hours.

Front

Third (Last) Quarter

Back

The half-way point between a Full and New Moon causing the left half of the moon facing Earth to be illuminated. Visible in the early morning hours.

Front

Orbit

Back

The curved path of a body moving around another due to gravity.

Front

Lunar eclipse

Back

The moon passes through the Earth's shadow during a (but not every) Full Moon phase.

Front

Kepler’s First Law

Back

The orbits of planets are elliptical, with the center of the Sun being at one focus point.

Front

Elliptical orbits

Back

Gravity and inertia combine, creating elongated paths of motion

Front

Solar Eclipse

Back

The moon casts shadow on Earth during a (but not every) New Moon phase.

Front

Kepler’s Second Law

Back

Objects move faster when they are closer to the Sun, causing them to sweep equal areas during an equal time interval.