Kata Tjuta is a second set of rocks located about 40km away from Uluru. Kata Tjuta is aboriginal for “many heads”.
There are some theories that Kata Tjuta is actually part of Uluru. The theory is that that it’s one giant rock that was formed in the place of a great inland sea. Over time the rock and the surrounding landscape buckled and twisted and the rock was distorted.
I don’t know if they are the same rock but the inland sea theory makes sense – when you’re close to Uluru you can see the layers run diagonally, not horizontally like you’d expect.