upgrade graphics card to Nvidia GeForce GTX 1070

I have a Dell XPS 15 9570 with an i7-8750 with a 32 GB RAM. I am wanting to upgrade my graphics card to Nvidia GeForce GTX 1070 so I may utilize VR gaming headsets.

Is it possible to up grade my graphics card to that size? Like, will it fit & can I just swap it out?

Thank you very much for your help. I almost know nothing when it ups to the upgrading specs of PCs