The AMS is expected to remain operational for 10 to 18 years, collecting around 16 billion cosmic rays each year.

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Given that we absorb some 40 millirems from our food (bananas being a large source funnily enough) each year, living in Denver gives you 50 millirems from cosmic rays, this seems a sensible enough low limit.

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They've dubbed it a cosmic ghost, and hope to get a better look at it next year when they can get some telescope time on the Hubble Space Telescope.

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They perform the Yaokwa ritual every year during the drought period to honour the Yakairiti spirits, thereby ensuring cosmic and social order for the different clans.

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Built for a two-year mission, the robot was more likely to last ten, with components hardened against cosmic rays and extreme temperature swings.

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