No scientist on Earth has yet established a proven way as how one might propel even a relatively small space craft in the scale of the Apollo command vehicle at near light speeds never mind a huge piece of space junk like a Death Star.
And "Repulse of General Johnson's Division by General Geary's White Star Division" depicts the seven-hour battle for Culp's Hill, a piece of strategic high ground that was basically the last thrust by the Confederate forces against the Union right flank.
The second piece of evidence pointing to is the eccentric orbit of an existing planet around the star, which is in an orbit not normally expected in this type of system.