The moon is said to be waning when less and less of the side facing Earth is lighted. :D
South-facing slopes in the southern hemisphere receive less direct sunlight, leading to less heating compared to north-facing slopes. This results in colder temperatures on the south-facing slopes because they do not receive as much warmth from the sun as the north-facing slopes.
The Earth is at the same angle, summer or winter. In winter the nearest pole to you is facing slightly away from the sun as the Earth moves in its orbit, in summer your nearest pole faces slightly towards the sun.
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The tilt of Earth's axis causes the Sun's light to shine more or less directly on different parts of the Earth as it orbits around the Sun. This tilt is responsible for the changing seasons and varying lengths of daylight throughout the year.
Seasons are caused by the tilt of the Earth in relation to the plane of its orbit. As Earth revolves around the Sun, each pole is alternately leaning "toward" or "away from" the Sun. This axial tilt is about 23 degrees from the perpendicular. But any tilt at all would be sufficient to give the poles 6 months of day and 6 months of night.
The moon phase where you see less of the lighted side is called the New Moon. During this phase, the moon is positioned between the Earth and the Sun, causing the side of the moon that is illuminated by sunlight to face away from Earth. As a result, the moon appears mostly dark and is often not visible in the night sky.
The new moon appears dark in the sky because the side of the moon facing Earth is not illuminated by the sun. During this phase, the moon is located between the Earth and the sun, so the side of the moon that is lit is facing away from us, making it seem dark.
"Waning" means that less and less of the moon's lighted side is visible from Earth as time goes on. That's what's happening during the entire two weeks from Full Moon until the next New Moon.
The motion of the moon in its orbit, which takes it to positions where we see more or less of the moon's lighted half from earth.
Those shapes, and the corresponding phases, are called "crescents" ... when the lighted part that we see is less than half of a full disk.
A waxing gibbous moon appears high in the east at sunset. It's more than half-lighted, but less than full.
Waning
During a lunar eclipse
A waning moon
The moon changing phases. Phasing as some call it.=====================================A waining moon. (The opposite - when the moon gets bigger each night is called a waxing moon).
After the full moon phase, the moon's illumination begins to decrease as it moves towards the new moon phase. This is known as the waning phase, where less and less of the moon's illuminated surface is visible from Earth.
The missing bit is found during a lunar phase called the crescent moon, where the illuminated portion of the moon is less than half. The missing portion is not visible to us on Earth, as it is facing away from the sun.