News tagged with night

Clouds amplify ecological light pollution

The brightness of the nightly sky glow over major cities has been shown to depend strongly on cloud cover. In natural environments, clouds make the night sky darker by blocking the light of the stars but around urban centers, ...

Mar 02, 2011
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STAR TRAK for February 2011

Jupiter will be the only bright planet visible as evening twilight fades during February, coming into view in the southwest. At mid-northern latitudes, this will be the last month until July when Jupiter will ...

Feb 03, 2011
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The incredible impact of stars on culture

For Hawaiian navigators, the star Sirius was "Hokuho'okelewa'a," meaning "star to guide canoe." Traditional Aboriginal Australians looked at the Magellanic Clouds and saw distant campfires in the sky.

Nov 19, 2010
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The man behind Comet Hartley 2

Over the last 40 years, Malcolm Hartley has done just about every possible job for Siding Spring Observatory's UK Schmidt telescope in New South Wales, Australia. The British-born, Scottish-educated Hartley ...

Nov 03, 2010
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Shift work and cancer

Shift work can cause cancer. In the new issue of the Deutsches Arzteblatt International (Dtsch Arztebl Int 2010; 107[38]: 657-62), Thomas C. Erren and colleagues describe the current state of knowledge in this area and po ...

Oct 08, 2010
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