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Unusual Martian region leaves clues to planet’s past

27 September 2016 Astronomy Now

Researchers studying the geography and mineralogy of an area on Mars known as Thaumasia Planum, based on Gamma Ray Spectrometer data collected by the Mars Odyssey Orbiter launched in 2001, have found that the mountain ridge outlining Greater Thaumasia was most likely created by a chain of ancient volcanoes.

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Longest-lasting stellar eclipse discovered

18 February 2016 Astronomy Now

Imagine living on a world where, every 69 years, the sun disappears in a near-total eclipse that lasts for three and a half years. That is just what happens in a newly discovered system, known only by its astronomical catalogue number TYC 2505-672-1, setting a new record for both the longest duration stellar eclipse and the longest period between eclipses in a binary star system.