Category Archives: astronomy

up where it’s cold

from Astronomy Picture of the Day, an amazing shot of Phoebe. Guess it’s time to pay some attention to the Cassini mission. (Cited on The Eternal Golden Braid)

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alone?

Data from the Infrared Astronomy Satellite have been used to search for Dyson spheres; no luck. (pdf; cited at Sharp Blue)

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rounding error

Well what d’ya know. You make a casual post to alt.language.artificial about leap-seconds and before you know it someone sends links on the subject: The Future of Leap Seconds; Extrapolations of the difference ( TI – UT1 ); Time Scales. Thanks Steve!

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the brief fame of 2003 QO104

Current asteroid impact risk. These tables interested me less for of the warning they carry than for the way they present data. I had wondered how astronomers reckon impact probabilities, and these tables present it neatly. (Explanations at the foot … Continue reading

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looking at us from Cydonia

Found in the archives, 1998 April 06: JPL has now released a processed image of the Face on Mars. . . . It looks nothing like a face. Is too! It’s a face whose left side shows the ravages of some disease, … Continue reading

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have you ever tried to come up with titles for fourteen hundred blog entries all at once?

A Dust Devil on Mars

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dark and light

Paracelsus gives some links about something of concern to many of us at this time of year: the time of sunset. FAQ; Navy calculator 2006: the FAQ link is broken; I imagine it’s merely moved on the same site, but … Continue reading

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