If an alien had a sufficiently powerful telescope and looked at Earth now from 5000 light years away, would he?

From 5,000 light years away they would be seeing ancient Egypt and watch the pyramids being built as well as the Great Wall of China. If this person the got into his space ship and traveled to Earth at the speed of light, no time will have ped for this pace traveler while Earth will appear to be some 10,000 years more advanced.