Encyclopedia : 1 : 13 : 13P (4 articles)

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13-pounder
The 13-pounder quick-firing field gun was the standard equipment of the British Royal Horse Artillery at the outbreak of World War I. It was developed as a response to combat experience gained in the Boer War and entered service in 1904. It saw action most famously at the Battle of Le Cateau in Au..
13P/Olbers
13P/Olbers is a periodic comet in our solar system. Heinrich Wilhelm Matthäus Olbers (Bremen) discovered the comet on March 6, 1815. Its orbit was first computed by Carl Friedrich Gauss on March 31, Friedrich Bessel calculated an orbital period as 73 a, later as 73.9 a, calculations by other asto..

 

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