why does the crysant moon look upside down near equader?

Answer 1

The crescent moon doesn't always look upside down near the equator. If you are looking at a rising moon right before sunrise the crescent will point towards the horizon, if after sunrise it will point upwards. Similarly, if you are looking at the a setting moon before sunset it will point up, and after sunset it will point downwards.

Most commonly people will notice the moon either before the sunrises or after it sets because the sky is dimmer and the moon appears brighter. So normally people think of the crescent moon whether rising or setting as pointing towards the horizon.

Answer 2

Because it's towards the edge of the horizon. Think about the geometry of it. Where you are, where the Moon is, and where the Sun is.

Doug