Complex sentence: The mission was to send 60,000 people to colonize an Earth-like extrasolar planet named Tanis to ensure humanity survived, which would take up to 123 years.two astronauts named Corporal Bower and Lieutenant Payton have awakened in a hyper-sleep chamber aboard a seemingly abandoned spacecraft.
Split into simpler sentences: The mission was to send 60,000 people to colonize an Earth-like extrasolar planet named Tanis to ensure humanity survived, which would take up to 123 years. Two astronauts named Corporal Bower and Lieutenant Payton have awakened in a hyper-sleep chamber aboard a seemingly abandoned spacecraft.