Do Neptune's moons have phases

Answer 1

No, neptune has 13 moons.

Uranus has 27 moons.

Saturn has 63 moons.

Jupiter has 64 moons.

Mars has 2 moons.

Earth has 1 moon.

Venus and Mercury don't have any moons.

Answer 2

Of course - Assuming you are not viewing it from a position that forms a fixed angle with the sun. Let's use Triton, Neptune's largest moon, as our example, just to be specific. Wherever you are, when you look at Triton you see a ball illuminated on one side by the sun. What that looks like to you depends on the angle between you and the sun, relative to Triton: Imagine a triangle, with you at one point, the sun at another, and Triton at the third corner of the triangle. The angle of the 'Triton corner' determines how Triton is illuminated from your point of view.

You can act this out on your living room floor with a flashlight for the sun and anything ball-shaped playing the part of Triton. Point the flashlight at Triton from 6 or 7 feet away, or more. And, well, yes - it has to be dark, and it works best if you lie on the floor. You can move around as if you were a spaceship or another moon, or you can 'orbit' Triton around you as if you were Neptune.

If you are on the same side of Triton as the sun, the whole visible surface of Triton will be lit up - it will be a "full moon". (Unless you block the light from the flashlight, simulating an eclipse.) If you and the sun make a right angle at Triton, one half will be illuminated and the other half dark. And so on.

Notice that Triton's phase only changes when the angle changes between you and the sun(flashlight).

Hope this helps,