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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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Researcher links mass extinctions to 'Planet X'

Periodic mass extinctions on Earth, as indicated in the global fossil record, could be linked to a suspected ninth planet, according to research published by a faculty member of the University of Arkansas Department of Mathematical ...

dateMar 30, 2016 in Astronomy
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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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