Here's why:
* The Moon's Orbit: The moon orbits the Earth, and it takes roughly 27.3 days to complete one orbit. During that time, the moon's position relative to the sun changes.
* Lunar Phases: As the moon orbits, we see different portions of its sunlit side. These are the phases of the moon (new moon, waxing crescent, first quarter, waxing gibbous, full moon, waning gibbous, last quarter, waning crescent).
* The Relationship to Sunrise/Sunset: Because of the moon's orbit and phases, the time of moonrise changes. A full moon will rise close to sunset, while a new moon will rise close to sunrise.
So, to be more specific:
* You might see the moon in the morning sky if it's a waning gibbous or waning crescent moon. This is because it rose later in the night and is still visible before the sun rises.
* You might see the moon in the evening sky if it's a waxing gibbous or waxing crescent moon. This is because it rose earlier in the day and is still visible after the sun sets.
It's important to remember that the moon's visibility is also affected by the time of year and your location on Earth.