... Tonight's Sky . ... Observing . ... Saturn's invisible ring . ... It shows Saturn's embedded т??ring current,т?? an invisible ring of energetic ions trapped in the planetт??s magnetic field. ... At Saturn, the Magnetospheric Imaging Instrument (MIMI) observed that the ring current's intensity seemed only weakly related to solar activity. ... Scientists are using these images to create a map of the invisible ring current, which is roughly five times farther from Saturn than its famous icy rings. ...