Nvidia has released an Apollo 11 tech demo exclusively for those who own Maxwell based GPUs. That means that only those who own the GTX 970 or the GTX 980 will be able to check out this demo.
Powered by UE4 and Maxwell, the demo shows how light from the moon’s surface – and astronaut Neil Armstrong’s space suit – illuminated Aldrin, thereby proving the authenticity of photos taken on that historic day.
Using VXGI, the Apollo demo lets you reconstruct the way light moved around the Apollo 11 landing site. VXGI – or Voxel Global Illumination – shows the way light bounces from one object to another in real time. To do that, VXGI breaks a scene’s geometry into many thousands of tiny boxes called “voxels,” or 3D pixels.
If you have either of those two cards, you can download the demo from Nvidia. If you don't own those cards and try to run the demo, you'll just be wasting your time as the demo refuses to run.
Instead, you can check out this video that Nvidia released that talks about the Moon landing and how this demo "debunks" the theory that the landing was faked.