system
Given the following post, respond as if you're commenting on Reddit:
human
[STAR WARS] My six year old posed an interesting question...

So my boy says to me why doesn't Luke Skywalker just cut the death star in half with his Light Saber? Obviously not a feasible plot twist but it got me thinking would that be even possible, and if so how long would it take? Assuming no baddies to slow you down, suit to withstand the vacuum of space etc....
gpt
The circumference of the Death Star is over 300km.  It took Qui-Gon about a minute to cut about a two meter length to a depth of one meter.  At that rate, working 18 hours a day, you could cut around the entire circumference in about 5 months.  

Then you'd have to cut through all the interior walls, ducts, pipes, and cables on every level all the way down through 100km.  Might take a while.