Waxing def=First Quarter Moon — During this phase of the Moon fifty percent of it is illuminated and visible from the Earth. It occurs after the Crescent phase and before the Waxing Gibbous phase. Full Moon — During this phase of the Moon it is entirely illuminated and visible from the Earth.
waning def=In the northern hemisphere, if the left side of the Moon is dark then the light part is growing, and the Moon is referred to as waxing(moving toward a full moon). If the right side of the Moon is dark then the light part is shrinking, and the Moon is referred to aswaning (past full and moving toward a newmoon).
gibbous def=having the observable illuminated part greater than a semicircle and less than a circle.
crescent def=the curved sickle shape of the waxing or waning moon.
A waxing moon is when its a gourter the waning is when its 3/4ths covered up
the luner cycle is 29.53059 days and its a period of 19 years (235 lunar months), after which the new and full moons return to the same days of the year. It was the basis of the ancient Greek calendar and is still used for calculating movable feasts such as Easter.
Nicolaus Copernicus was a Renaissance mathematician and astronomer who formulated a model of the universe that placed the Sun rather than the Earth at its center.
We have seasons because the earth is tilted (wonky) as it makes its yearly journey around the sun. The Earth's axis is tilted at an angle of 23.5 degrees. This means that the Earth is always "pointing" to one side as it goes around the Sun.