A space enthusiast has demanded NASA explain a "UFO" after an unexplained patch of light in the shape of a Star Wars spacecraft appeared above the earth during a live feed.

Jadon Beeson was watching a stream of the International Space Station on his iPhone on Tuesday when a strange object appeared in the background.

The 20-year-old Brit said NASA "cut the live feed for an hour" after it showed up.

He says he has asked NASA explain the "clearly defined UFO", which was broadcast on NASA's official app, but they have not responded.

"It was unquestionably real and present. It looked like the Millennium Falcon," he told The Mirror, referring to Han Solo's spaceship in Star Wars.

It is the second time in a month NASA has been accused of covering up "UFO" activity.

Scott Waring noticed a strange metallic object while watching footage from the International Space Station (ISS) on March 9.

Like Mr Beeson, he claimed NASA cut the footage after it appeared.