dust

The European Space Agency's (ESA) Rosetta mission spent two years at the comet 67P/Churyumov-Gerasimenko. At the end of September 2016, its mission was ended when the spacecraft was sent on a collision course into the comet.   During…
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Once upon a time, the great planet Jupiter was orbited by a glorious ring of dust, according to astronomers. Now, nothing of it remains, having coalesced long ago into the planet's Galilean moons.   But these moon-forming discs should…
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It's easy to take for granted the detailed, almost real-time knowledge of Mars that we have at our fingertips. After all, in the not-too-distant past, Mars was largely mysterious. All we had were ground-based images of the planet. Now?…
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Cloud watchers have recently been given record-breaking glimpses of the rarest clouds in the skies. Stunning rippled blue clouds have been forming in the highest reaches of the atmosphere over Europe and the USA.   These clouds are…
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The beginning of the end of our galaxy is just a few billion years away. That's when the glittering disk of the Milky Way is projected to smash into its nearest neighbor, a spiral galaxy called Andromeda.   The force of the collision…
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