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1 .This is Scientific American's 60-Second Space. I'm Lee Billings. Got a minute?
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2 .What smells like rotten eggs, a used litter box and an almond-munching mortician?
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3 .The answer is one of those dirty snowballs in space, a comet.
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4 .Comet Churyumov-Gerasimenko, to be exact, which is starting to thaw as it closes in on the sun.
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5 .Since August, the European Space Agency's Rosetta spacecraft has been monitoring the comet.
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6 .Right now, Churyumov-Gerasimenko is between the orbits of Mars and Jupiter, some 300 million miles from Earth.
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7 .It's so chilly out there that scientists expected Rosetta's instruments to detect scarcely more than odorless carbon dioxide from the comet.
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8 .But instead Rosetta has also detected hydrogen sulphide with its rotten egg odor, as well as ammonia, with a smell familiar to anyone who has changed a cat pan.
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9 .Also in the mix: formaldehyde and methanol, found in embalming fluid, mixed with faint traces of poisonous hydrogen cyanide, which has an almond-like aroma.
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10 .Rosetta will deploy a probe to land on the comet this November, and will soon gather more pungent whiffs of the comet's appalling perfume.
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11 .But by studying this eau de comet, researchers hope to better understand the deepand apparently smelly, chemical origins of our solar system.
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12 .Thanks for the minute, for Scientific American's 60-Second Space. I'm Lee Billings.
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