Did you hear about the great new restaurant on the луна? The food is delicious, but there's no atmosphere! Hahahaha!

The word луна means moon. Is the joke funnier now?

Где луна? Я ничего не вижу!
Where is the moon? I can't see a thing!

Сколько лун вокруг Сатурна?
How many moons are around Saturn?

In Arizona all I have to do is drive for about a half an hour out of Phoenix on any given night to get a great view of the sky. It's really convenient since:

Я люблю смотреть на луну.
I love to look at the moon.

При солнечном затмении Луна частично или полностью закрывает Солнце. (adapted from this source)
During a solar eclipse the moon partially or completely covers the sun.

Мы стояли под яркой луной.
We stood under the bright moon.

Когда следующее полнолуние?*
When is the next full moon?

* The roots полн- ‘full’ and лун- ‘moon’ combine as «полнолуние» to mean a full moon.