Phases of the Moon #RockinReview
The moon at any time after new moon and before full moon, so called because its illuminated area is increasing.
The moon at any time after full moon and before new moon (so called because its illuminated area is decreasing).
It’s when the Moon is more than half full, but not quite fully illuminated.
A crescent moon is part way between a half moon and a new moon, or between a new moon and a half moon.
The cycle of the different stages of the moon that takes about 29.5 days.
Earth's Season and Eclipses
Nicolai Copernicus radically changed our understanding of astronomy when he proposed that the sun, not Earth, was the center of the solar system.
We have seasons because the Earth orbits the sun elliptically and at the same time spins on an axis that is tilted relative to its plane of orbit. This means different hemispheres are exposed to different amounts of sunlight over the year. The sun is our source of light and heat and the changing concentration of its rays give the rise to Winter, Spring, Summer, and Fall.
This is because temperature depends not only on the amount of heat the atmosphere receives from the sun, but also on the amount of heat it loses due to the absorption of this heat by the ground and ocean.
If the Moon happens to be too far from Earth for its disk to completely hide the Sun, an annular eclipse occurs. The moons orbit around the Earth is slightly inclined with respect to the ecliptic, solar and lunar eclipses do not occur every month.
We have day and night because of the fact that Earth spins on its axis and rotates which means that when the Northern Hemisphere is facing the sun, we have day and light, and when we are facing away from the sun we have night and dark and the Southern Hemisphere has day and light.