Nasa has revealed new close-up images of the interstellar comet that is currently visiting our solar system.

Comet 3I/Atlas is currently on a quick tour of the solar system, before it will leave forever.

It was spotted over the summer and is only the third known object to have come into our solar system from orbit around another star.

The comet’s intriguing nature has even led some to speculate that it could be an alien spacecraft – though scientists caution that all of its characteristics are explained by it being a natural phenomenon .

Several Nasa spacecraft at and near the red planet zoomed in on the comet as it passed just 18 million miles (29 million kilometers) away. The European Space Agency's two satellites around Mars also made observations.

Astronomers are aiming their

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