Earth phase

Earth's albedo is three times as high as that of the Moon (due in part to its whitish cloud cover), and coupled with the wider area, the full Earth glows over 50 times brighter than the full Moon at zenith does for the terrestrial observer.

However, due to the Moon's libration, Earth does perform a slow and complex wobbling movement.

Once a month, as seen from the Moon, Earth traces out an approximate oval 18° in diameter.

The exact shape and orientation of this oval depend on one's location on the Moon.

To be aware, although genuine photographs of the Earth viewed from the Moon exist, many from NASA, some photographs shared on social media, that are purported to be the Earth viewed from the Moon, may not be real.

Earth's phase changes angle throughout the seasons due to Earth's axial tilt , here viewed from geostationary orbit .