In August 1951 a series of unusual lights appeared in the night sky over a Texas city for weeks before disappearing and they have never been seen again.

The unexplainable and erratic nature of the bright beams terrified the residents and grainy images of the event still capture the attention of conspiracy theorists today.

The lights were first sighted on August 25 in Lubbock by a group of scientists that were hanging out in a colleagues backyard one evening, reports news.com.au.

At around 9.20pm the group all witnessed something that they couldn't explain: 15 to 30 bright blueish-green lights appeared in the sky and silently whizzed overhead in a V-formation.

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