Nothing gets past eagle-eyed audiences who are all too eager to share the latest TV or movie gaffe on social media.

Remember when Game of Thrones fans noticed the anachronistic chalice in the form of a Starbucks cup left in plain sight?

Another bungle just surfaced, but this time the recent discovery was from a long time ago in a galaxy far, far away.

It turns out that lightsaber Luke Skywalker was wielding in Star Wars: The Empire Strikes Back was apparently an import from the planet earth.

Uproxx noted that Pablo Hidalgo – a Lucasfilm executive on the Star Wars franchise – tweeted about his discovery from the 1980 Star Wars sequel.

It was an innocuous tweet at first.

"I've noted this before, but every time I watch a 'Star Wars' movie, there's something new to notice. Especially if I'm fortunate to catch it on the big screen."

And then he shared his jarring revelation with juxtaposed images of Luke's lightsaber.

"This latest discovery? that 'NEW YORK' is visible on the bottom of Luke's lightsaber in EMPIRE."

The image on the left was pulled from the movie with a barely-visible "New York" written on the bottom of the lightsaber. On the right is an image of the actual naked prop from the film before the etchings were buffed out and other pieces were added.

Can you see it?

It may take a lot of effort to even notice, but it is there.

Uproxx's Josh Kurrp said the only link he could find between Luke's lightsaber and New York was the sound designer making recordings for The Empire Strikes Back during a family visit.

"[Sound designer] Ben Burtt recorded sounds of people in snow while visiting his family in upstate New York, which were used for the Hoth scenes."

With its universal appeal, it's hard to believe ardent fans of Star Wars missed the marking.

Although to be fair, the etching is easy to miss if you don't know what you're looking for.

It stands to reason then that Hidalgo, who has probably seen the movie a hundred times, was the first to notice the goof.

ComicBook weighed in with their thoughts on the discovery.

"This is a very small error, and hard to even notice if you aren't looking forward. It's honestly surprising that Hidalgo even found it in the first place."

"Then again, with as closely as 'Star Wars' fans have watched these movies over the years, it's hard to believe it took this long for someone to see it."

The fictional energy sword is used in combat by the Jedi order and their Sith counterparts. The luminescent blade consists of magnetically contained plasma that shoots from a metal hilt that was, well, not manufactured in New York.

Special effects expert John Stears created the prop by re-purposing various pieces of hardware, including Graflex press camera flash battery packs.

In the photo on the right from Hidalgo's tweet, you can clearly see the word "Graflex" stamped at the base of the hilt, signifying the handles from the Graflex flash gun retrieved by set decorator Roger Christian.

Don't mess with the Star Wars-obsessed. If you attempt to challenge them on trivia you may find yourself sinking into the Sarlacc Pit.

If you claim to be a true Star Wars aficionado and don't have any knowledge of the following, you're bantha fodder.

Oh Starbucks, why did you meddle with this Sci-Fi movie from 1977?

Why NYC?

There you have it.

After 39 years since The Empire Strikes Back hit theaters, there is nothing more shocking than seeing "New York" on a lightsaber, forcing us to come to grips with reality.

You can relive Star Wars Episodes I-VI in one go with the complete set, available here. Maybe you'll see something you never noticed before.