An earthrise that might be witnessed from the surface of the Moon would be quite unlike moonrises on Earth. Because the Moon is tidally locked with the Earth, one side of the Moon always faces toward Earth. Interpretation of this fact would lead one to believe that the Earth’s position is fixed on the lunar sky and no earthrises can occur, however, the Moon librates slightly, which causes the Earth to draw a Lissajous figure on the sky. This figure fits inside a rectangle 15°48′ wide and 13°20′ high (in angular dimensions), while the angular diameter of the Earth as seen from Moon is only about 2°. This means that earthrises are visible near the edge of the Earth-observable surface of the Moon (about 20% of the surface). Since a full libration cycle takes about 27 days, earthrises are very slow, and it takes about 48 hours for Earth to clear its diameter.
The Earthrise videos were shot while orbiting around the Moon in an (approximately) equatorial circular orbit, not from the surface. That’s why the effect is similar.
Agree. My intention was and still is, that people would understand how peculiar sky is above the Moon. For one, there is Earth just hanging (oscillating a little, that’s true) in the sky. Here we have Polaris, doing the same, but on the northern, not equatorial sky. It’s worth to mention, that from the Moon south pole, you always see the Sun and Earth. Sun orbiting around, Earth not.
If you didn’t know it already
Not quite true:
Thanks, a correction has been made.
The Earthrise videos from Apollo were shot while orbiting around the Moon.
The Earthrise videos were shot while orbiting around the Moon in an (approximately) equatorial circular orbit, not from the surface. That’s why the effect is similar.
Agree. My intention was and still is, that people would understand how peculiar sky is above the Moon. For one, there is Earth just hanging (oscillating a little, that’s true) in the sky. Here we have Polaris, doing the same, but on the northern, not equatorial sky. It’s worth to mention, that from the Moon south pole, you always see the Sun and Earth. Sun orbiting around, Earth not.