Why does the Moon look tilted?
Because, relative to the plane of the Moon's orbit, we are tilted.
You see a Crescent Moon looking exactly like a horizontal bowl. Where on Earth are you?
-
You would be on the equator where the Sun goes straight up from the eastern horizon and straight downward toward the western horizon. The Moon phases then lie on their side.
You see a Waxing Crescent Moon that looks like our drawing of a Waning Moon, reversed from right-to-left. Where on Earth are you?
-
You would be in the Southern Hemisphere. The easiest way to think about it is near the equator where the phases are horizontal and tilt one way when you stand North of the equator and the other way when you stand South of the equator.
One night, you see a Waxing Crescent Moon that looks like our drawing of a Waning Moon, reversed from top to bottom. Where are you?
-
Not on Earth. With the Sun below the horizon, the lit part of the Moon must be at the bottom since that is the direction of the Sun. For the lit part to be on top, it must be daytime or else the Moon must be lit by a celestial spotlight.
