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The colour-changing comet

Rosetta's comet has been seen changing colour and brightness in front of the ESA orbiter's eyes, as the Sun's heat strips away the older surface to reveal fresher material.

dateApr 08, 2016 in Space Exploration
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A 'tail' of two comets

Two comets that will safely fly past Earth later this month may have more in common than their intriguingly similar orbits. They may be twins of a sort.

dateMar 18, 2016 in Space Exploration
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