Alien Ship Invation

Its 2354. Your in a battle-class transport ship. You are near a planet. You landed on a planet about 3.9 parsecs behind you. You were moving fine for 3 days. Suddenly, you here a crash. You were attacked, but by who? You check the radar. There are no ships in your range. You send a scout out to were you herd the crash... he never came back. What is it? You must take a journy through your own ship. Will you servive? Lets see...