Star Wars lead starship designer and previous CBS analyst for the moon landing Colin Cantwell has passed away. He was 90 years old.

His partner Sierra Dall confirmed that he died at home in Colorado on Saturday to The Hollywood Reporter.

Colin Cantwell is a name well-known in the Star Wars world. He’s the man who came up with the designs of many iconic Star Wars ships and space stations like the X-Wing, TIE Fighter, Y-Wing, the sandcrawler and the Death Star. He worked closely with George Lucas to draw and build prototypes for the aforementioned ships. Here’s what he had to say about the creation of the iconic station of doom, the Death Star, and how it ended up getting a trench where Luke did his X-Wing run in the first film.

“I didn’t originally plan for the Death Star to have a trench but when I was working with the mold, I noticed the two halves had shrunk at the point where they met across the middle. It would have taken a week of work just to fill and sand and re-fill this depression. So, to save me the labor, I went to George and suggested a trench. He liked the idea so much that it became one of the most iconic moments in the film!”

Apart from Star Wars, Colin has also worked on 2001: A Space Odyssey, Buck Rogers in the 25th Century, and WarGames. He made the computer graphics for the latter movie that dramaticize a nuclear launch that would inspire DEFCON. Rest in peace, Colin, and thank you for the iconic starships.