The Moon Above Tonight – Moon Phase and Orientation

Everyone on Earth sees the same Moon at the same moment. The lit fraction is nearly identical whether you are watching from Quito or Reykjavík. What changes from place to place is the tilt of the Moon.

Stand near the equator and the young crescent often lies on its back, a shallow bowl open to the sky. Look at the same crescent in a further northern latitude and it stands up on its edge, making something close to a backwards letter C. The Moon did not move. You did. The horizon under your feet turned, and the Moon’s face turned with it.

Our moon phase and orientation tool lets you watch that happen. Set a moment and a place, then drag the latitude sweep and keep your eye on the Moon. The bright limb rotates, the horns swing around, and the phase name stays put the whole time.

How to Use the Moon Phase and Orientation Tool

What you can watch change as you move the location:

Illuminated is the fraction of the disk in sunlight. This is constant for the day across the Earth.

Bright limb tilt is how far the lit edge leans from straight up. This is the display appearance that moves most as you sweep latitude.

Parallactic angle is the geometry: the angle between “up” from where you stand and the direction to the celestial pole.

Altitude is how high the Moon sits above your horizon, with the compass direction it is sitting in. When it drops below zero the sky shows it anyway, as if the Earth were glass and you were still able to see it.

The horns point away from the Sun, so they tell you which way the crescent is opening. Watch them rotate as you travel north or south.