NASA may be an agency of extremely intelligent science buffs, but that doesn’t mean they can’t have a little fun on April Fools’ Day.

For their Astronomy Picture of the Day, the agency is challenging visitors to try and tell the difference between a photo of the moon and a photo of an old trying pan. Can you tell which is which?

The crater might make the decision a little easier, but there are plenty more quizzes where that came from. Test your planetary identifying skills with the full challenge.