Stargate (junior novel)

Publisher's summary
The StarGate - its powerful secret riddle hidden for 10,000 years - has been uncovered. Brilliant archaeologist Daniel Jackson ad fearless leader Colonel Jack O'Neill are the mismatched duo who lead a military team through the Gate to the unknown. Millions of light years from Earth, they discover a human society enslaved by the tyrannical Egyptian god Ra. Locked into battle against his high-tech forces, the team must fight for their lives. Even if they survive, will they ever get home again?