Write the introduction to a story about a rocket ship on its way to a distant galaxy

Deep space. It had been so long since they last had a reference point. How long? Was it days? Weeks? Months? The crew didn't know. They longed for a feature, some contact; a planet, even a small asteroid would do. Deep space is a lonely place. 

But the thought of the mission and the uniqueness of their experience kept them going. They had travelled further than any crew before. They had left the solar system and were well on their way to Andromeda. They would be the first, they would be the pioneers who discovered new lands for the human race. 

Days continued to pass - or was it weeks again? They started to hear strange sounds from the ship. Was it mechanical issues? Did they have a visitor? Or was it just their minds turning on them?