A rocket launch expected to produce a spectacular light show was last night delayed for a fourth time.

US space agency Nasa tweeted that the launch was “scrubbed” because of “upper level winds not being within the required limits for a safe launch” in the area of Bermuda and the Wallops launch site in Virginia.

But officials said another take-off attempt will be made sometime after 8.06pm today.

The Black Brant XII rocket launch, which will cause fluorescent green and violet skies after it releases barium gas into the atmosphere, was expected to take off last Friday.

It will release its load just north of Bermuda about ten minutes into its flight.

The launch is part of a Nasa experiment to study energy flows in Earth’s upper atmosphere.

For updates on the launch, check https://twitter.com/NASA_Wallops.