Astronomers announce new data on Pluto's moon Charon obtained during an occultation of a star in July 2005.

The predictions are complicated, because they have to take into account the motion of Pluto's moon Charon, and P126A also turned out to have a close companion.

In 1978, the discovery of Pluto's moon Charon radically changed this picture.

The sea isn't stagnant, because of what that big ol' moon Charon is doing in its synchronous orbit.

The name of Pluto's moon Charon was suggested by James W. Christy, its discoverer, soon after its discovery.

Pluto's large moon Charon is about half the size of Pluto.

If astronomic observations are correct, Pluto and its moon Charon may be the oddest couple in the solar system.

Image above: Pluto, center and it's previously known moon Charon, below Pluto and right of center, shine brightly.

Pluto's size was finally determined conclusively in 1978, when American astronomer James W. Christy discovered its moon Charon.

Among other trans-Neptunian objects Pluto's moon Charon appears to be most similar to Orcus.