Colossal moon Titan casts a shadow on Saturn's cloud tops early on Sept. 4. Will you be able to see it?

A simulation of Saturn is shown, with the dark silhouette of the large moon Titan visible as a dark circle on the upper left part of the planet's disk. Cloud bands are pictured crossing the planet's surface above and below the gas giant's ring system, which is orientated almost edge-on to the viewer.

Heads up stargazers! The shadow of Saturn's largest moon Titan will skim across the gas giant's swirling cloud tops in the early morning hours of Sept. 4. Here's everything you need to know about how to catch the rare transit event.

Once every 15 years, the orbital mechanics of the solar system bring Saturn's iconic rings — and the orbit of Titan — into an edge-on alignment with Earth, opening a season of shadow transits in which the silhouette of the vast moon can be seen crossing the gas giant's surface