Could this be an 'alien megastructure' hovering over the skies of Melbourne?

A prolific Australian UFO hunter seems to be believe it to be so after this video was posted on YouTube.

Inquisitr reports that UFO Lou spotted the mysterious presence in the skies of Victoria on November 13 and the appearance lasted for about two minutes.

View photos What is the strange green triangle? Photo: YouTube/ UFO Lou More

View photos

UFO Lou said online: "Never seen anything like this before.

"Object seems static. Simply appears, lasts a few minutes, and then vanishes. Massive in size. Using a 50mm lens."

The footage appears to show the object coming into view beginning as a faint shadow and then becoming solid over 15 seconds.

As the object becomes clear it then disappears.

What do you think?

RELATED: DO ALIENS EXIST?

The modern fascination with UFOs can be attributed to the infamous 'Roswell crash' and extra-terrestrial enthusiasts recently seized on new proof that we are not alone.

An airline passenger recently captured footage of strange UFO orbs over Atlanta, Georgia, USA.

An apparent triangular UFO was caught on camera over York, England. What do you think it could possibly be? Something real, or was editing work involved?

A passenger aboard a commercial airliner recorded footage of an apparent unidentified flying object over Iran. Have you ever witnessed any strange sights from the window of an aircraft?

Nine celebrities reveal their obscure encounter with a mystery flying object.

Did Victoria Beckham really see what she thinks she saw?

Two different views showing an apparent unidentified flying object beside a commercial airliner over Los Angeles, California.

An apparent unidentified flying object appears in the sky during this time lapse video featuring a sunset over Berau, Germany. Did alien visit Earth?