Yes, Neptune does have nights and days, just like Earth.

Here's why:

* Rotation: Neptune rotates on its axis, meaning it spins. One full rotation takes about 16 hours.

* Sunlight: Even though Neptune is far from the sun, it still receives sunlight.

* Day/Night Cycle: As Neptune spins, one side faces the sun (daytime) while the other side faces away (nighttime).

However, there are some key differences from Earth:

* Longer "Days": Because Neptune's orbit around the sun is so long (165 Earth years), its "year" is very long. This means that a single day on Neptune (16 hours) is a tiny fraction of its "year."

* Dim Light: The sunlight reaching Neptune is very weak, so "daytime" on Neptune would be much dimmer than daytime on Earth.

So, Neptune has nights and days, but they are very different from Earth's due to the planet's long orbit and distance from the sun.