I am trying to remember a science fiction series from the '80s where humans travel to a distant planet/galaxy using a new kind of fuel source. When they arrive at their destination, they find the planet is already inhabited by Egyptian type people similar to Egypt on Earth.
The combination of 80s and (Space) Egypt made me think of the TV series "Otherworld"
"References to Egyptian mythology abound, particularly in the signposts which the Sterlings use to attempt to find Imar; it was implied that the ancient Egyptians either had the ability to travel between universes, or had contact with a people that did."
The original Battlestar Galactica had the heroes find the lost planet of Kobol. The ancient pyramids on that planet looked suspiciously like the ones in the Giza Plateau.
After Adama enters the pyramid and finds a journal of the thirteenth colony, it is promptly bombed by Cylon raiders before he can read it.