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Latest Henry Roe Stories

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2009-08-12 14:20:00

Ground-based telescope captures first visual images of storm clouds over the tropics of Saturn's largest moon Taking advantage of advanced techniques to correct distortions caused by Earth's atmosphere, astronomers used the NSF-supported Gemini Observatory to capture the first images of clouds over the tropics of Titan, Saturn's largest moon. The images clarify a long-standing mystery linking Titan's weather and surface features, helping astronomers better understand the moon of Saturn,...

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2005-10-31 07:00:00

There is only one moon in our solar system that has clouds, Saturn's giant moon Titan. First discovered by a scientist using an earthbound telescope, the clouds were later confirmed by NASA's Cassini spacecraft. Chris McKay, a planetary scientist at NASA Ames Research Center, recently gave a public lecture, sponsored by the Planetary Society, about what scientists have learned about Titan from the Cassini-Huygens mission. In this, the second part in a four-part series, McKay talks about...


Word of the Day
siliqua
  • A Roman unit of weight, 1⁄1728 of a pound.
  • A weight of four grains used in weighing gold and precious stones; a carat.
  • In anatomy, a formation suggesting a husk or pod.
  • The lowest unit in the Roman coinage, the twenty-fourth part of a solidus.
  • A coin of base silver of the Gothic and Lombard kings of Italy.
'Siliqua' comes from a Latin word meaning 'a pod.'
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