Wikipedia:Main Page history/2018 August 10

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Exoplanet Fomalhaut b (Dagon)
Exoplanet Fomalhaut b (Dagon)

Only a small fraction of the 3,800 known exoplanets are located in the vicinity of the Solar System. Of the 400 stars known to be located within 10 parsecs (32.6 light-years), just 26 have been confirmed to have planetary systems. Only eight of these planetary systems are located around stars visible with the naked eye. One of the earliest confirmations for an exoplanet, or planet orbiting a star other than our Sun, was in 1998 for a planet orbiting around Gliese 876 just 15 light-years away. Since then, several closer exoplanets have been discovered, including an exoplanet found in 2016 to orbit Proxima Centauri, the closest star to our Solar System just 4.25 light-years away. A system containing six exoplanets has been observed around HD 219134, 22 light-years away. Some of the closest exoplanets have been proposed to have potential for human habitability. (Full list...)

Today's featured picture

Marshall Hole currency

A three pence note of "Marshall Hole currency", issued in Bulawayo in 1900. Owing to the shortage of small change and circulating coinage in Rhodesia during the Second Boer War, Hugh Marshall Hole, Government Secretary for Matabeleland, authorised the use of small cards bearing a British South Africa Company postage stamp on the obverse, and an official handstamped signature on the reverse. These cards circulated as emergency currency between 1 August 1900 and their withdrawal on 1 October 1900. A total of £20,000 worth of stamps were used, in denominations of 2d, 3d, 4d, 6d, 1/-, 2/-, 2/6, 4/-, 5/- and 10/-.

Banknote: Office of Hugh Marshall Hole (image courtesy of the National Numismatic Collection, National Museum of American History)

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