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9 September 2013

See the Meridian laser

The evenings are already starting to lengthen, making it much more likely that we all find ourselves wandering around outside after dark. If doing so in a particular part of South East London, a green laser is often seen in the sky over the Thames and Greenwich, marking the Prime Meridian of the World – Longitude 0º.

A laser has been shining out from the Royal Observatory since 1993, and the current version has been doing so since 1999, when a more effective Millennia VS Diode-Pumped laser was installed.

For more, see http://www.thegreenwichmeridian.org/tgm/articles.php?article=14

^Picture © Toms Bauģis used under a Creative Commons license^

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