Complex sentence: Chang'e 3 is scheduled to land on latitude 44 ° North at Sinus Iridum, a plain of basaltic lava that forms a northwestern extension to the Mare Imbrium.
Split into simpler sentences: Chang'e 3 is scheduled to land on the Sinus Iridum at a latitude of 44 ° north. The Sinus Iridum is a plain of basaltic lava that forms a northwestern extension to the Mare Imbrium.