As every photographer knows, perspective can have a big impact on the way objects are perceived. In this photo, Saturn's moon Rhea
appears to hover just above the moon Epimetheus
, with Saturn's rings in the background.
But appearances can be deceiving: Cassini took the photo 746,000 miles from Rhea and 994,000 miles from Epimetheus. Therefore, the two moons aren't actually very close to each other. And while Rhea is a larger satellite than Epimetheus, this perspective exaggerates its size advantage: Rhea measures 950 miles in diameter, while Epimetheus is 71 miles in diameter.