Stargazers were treated to a rare astronomical phenomenon when a total lunar eclipse combined with a so-called supermoon.

Those in the United States, Europe, Africa and western Asia were able to view the coupling, weather permitting, on September 27, 2015.

It was the first time the events had made a twin appearance since 1982, and they won't again until 2033.

When a full moon makes its closest approach to Earth, it appears slightly bigger and brighter than usual and has a reddish hue.

That coincides with a full lunar eclipse where the moon, Earth and sun will be lined up, with Earth's shadow totally obscuring the moon. (AP)

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