attack ships on fire off the shoulder of orion

That line is a famous quote from the science fiction film Blade Runner. It’s part of a monologue delivered by Roy Batty, a replicant (artificial human) near the end of the movie. The full line is:

“I’ve seen things you people wouldn’t believe. Attack ships on fire off the shoulder of Orion. I watched C-beams glitter in the dark near the Tannhäuser Gate. All those moments will be lost in time, like tears in rain… Time to die.”

It’s a very poetic and haunting description of things Batty has experienced in his short lifespan as a replicant, meant to evoke a sense of wonder and loss.