Saturn's not-so-famous giant ring

The Spitzer infrared space telescope imaged a very large and extremely tenuous ring around Saturn in October of last year, sharing the orbit of its innermost retrograde satellite Phoebe.

The media were likely to make much of this but so far we've heard very little. It certainly helps to explain the strange albedo asymmetry of Iapetus. There is a BBC story here, but the image they have included does not show the new ring at its correct size. The picture above is an artists conception, but correctly to scale.

See here for NASA press release.