Keystone/Hulton/Getty ImagesHalf a century after the first humans walked on the moon, Earth's satellite buddy will finally be getting its first communications system. That's right, soon the moon will be graced with a 4G cellphone network. Instead, the system will help two Audi quattro lunar rovers communicate with a base station that weighs just over 2 pounds (0.9 kilograms) and is called, aptly, the Ultra Compact Network. AdvertisementAdvertisementUsing the high-speed, energy-efficient network, the rovers will transmit a raft of scientific data, high-resolution pictures and video to the base station. The Audi rovers won't just be going for leisurely Sunday drives.