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ESA Operations

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ESA’s second #asteroid-spotting Test-Bed Telescope has seen ‘first light’ – the first time a new telescope is used to look up at the sky. The telescope – dubbed TBT2 –

ESA and NASA line up satellites to measure Antarctic sea-ice"This could be revolutionary. We may never get the chance again to do this with two such different instruments." explains Tommaso

#SOHO has found 4000 comets!With #AsteroidDay coming up, we thought we'd dig into the potentially risky side of these cosmic snowballsHave there been comet impacts with Earth?Do we know of

A simple question for the Twittersphere ... Which planet is closest to Earth? (No googling!)#CelestialMechanicsQuiz With 2,513 votes in, and many comments asking "when!?" we can confirm that:Mercury is the