First, scientists find the Mars Polar Lander.
Now, astronomers on the Cassini project have found a moon tucked inside Saturn rings.
The unnamed moon showed up in pictures taken by Cassini last week. The moon appears in the images as a tiny ball in a 155-mile wide black space in the ring known as the Keeler gap.
The edges of the rings even show a wavy pattern that scientists attribute to influence from the moon’s gravity.
The moon appears to be about four miles wide, NASA said.