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Waning

Waning means decreasing in size, as the Moon moves from the Full Moon toward a New Moon.

Waning Gibbous - moving from Full Moon to Last Quarter

Waning Crescent - moving from Last Quarter to New Moon

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Why the dwarf planets have moons?

planets have moons for day and night


Why doesn't the circle of illumination co inside with the axis of the earth?

The circle of illumination does not coincide with the axis of the Earth because the Earth is tilted on its axis at an angle of approximately 23.5 degrees relative to its orbit around the Sun. This tilt causes the Sun's rays to illuminate different parts of the Earth at different angles throughout the year, resulting in varying lengths of day and night. As a result, the circle of illumination, which separates day from night, shifts and is not aligned with the Earth's rotational axis.


Why does the circle of illumination not coincide with the earth's axis?

The circle of illumination does not coincide with the Earth's axis because it is determined by the position of the Sun relative to the Earth. As the Earth rotates on its tilted axis, only half of the planet is illuminated by sunlight at any given time, creating the circle of illumination that divides the day side from the night side. The tilt of the Earth's axis (approximately 23.5 degrees) also affects the angle and extent of sunlight received, further separating the circle of illumination from the axis itself.


Which planet fits all three categories larger than earth has moons day longer than 24 hours?

The planet that fits all three criteria—larger than Earth, has moons, and has a day longer than 24 hours—is Mars. Mars has a day (known as a sol) that lasts about 24 hours and 37 minutes. It is larger than Earth in terms of its overall volume and has two small moons, Phobos and Deimos.


How long is 1 day on Io?

A day on Io, one of Jupiter's moons, lasts about 42.5 Earth hours.