NASA has stumbled across a mysterious object while roaming Mars that's caught the attention of space enthusiasts.

The unlikely piece has been likened to a medieval helmet due to its odd shape.

It was pictured by the space agency's Perseverance rover that's been on the look out for signs of alien life.

"Gandalf’s hat or a pot helmet?" one person remarked on Facebook.

"The Planet of the Sorting Hats has been found!" another said in reference to Harry Potter.

A third joked: "Martian buffalo's dung — nothing abnormal about it."

Other guesses included it looking like a "landed weather balloon" or "a relic from an ancient sea that was once on Mars".

The photo was named as Nasa's Image of the Week by public vote and has been a source of discussion since.

However, it's not some abandoned

See Full Page