Today's Astrophoto Friday image is an animated gif of three discovery images that show Quaoar's motion against the background of the sky.
Quaoar is part of a population of objects that lie out beyond the orbit of Neptune that make up what is known as the Kuiper Belt. The artwork below illustrates the sizes of the largest known worlds of these icy bodies, with a section of Earth at the bottom for scale.
Quaoar has one known moon, Weywot. Studies of Weywot's orbit about Quaoar have led to estimates of its mass an density. Surprisingly, Quaoar has a density more like rock than ice.
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