1 Jan 2010 01:05
[Daily article] January 1: Ceres (dwarf planet)
English Wikipedia Article of the Day <daily-article-l <at> lists.wikimedia.org>
2010-01-01 00:05:09 GMT
2010-01-01 00:05:09 GMT
Ceres is the smallest identified dwarf planet in the Solar System and the only one in the asteroid belt. It was discovered on 1 January 1801, by Giuseppe Piazzi, and for half a century it was classified as the eighth planet. It is named after Ceres, the Roman goddess of growing plants, the harvest, and motherly love. With a diameter of about 950 km (590 miles), Ceres is by far the largest and most massive body in the asteroid belt, and contains a third (32%) of the belt's total mass. Recent observations have revealed that it is spherical, unlike the irregular shapes of smaller bodies with lower gravity. The surface of Ceres is probably made of a mixture of water ice and various hydrated minerals like carbonates and clays. Ceres appears to be differentiated into a rocky core and ice mantle. It may harbour an ocean of liquid water underneath its surface. From the Earth, Ceres' apparent magnitude ranges from 6.7 to 9.3, and hence at its brightest it is still too dim to be seen with the naked eye. On 27 September 2007, NASA launched the Dawn space probe to explore Vesta (2011–2012) and Ceres (2015). Read the rest of this article: <http://en.wikipedia.org/wiki/Ceres_%28dwarf_planet%29> _______________________________ Today's selected anniversaries: 1801: The Kingdom of Ireland formally merged with the Kingdom of Great Britain, adding St. Patrick's saltire to the Union Flag. <http://en.wikipedia.org/wiki/Act_of_Union_1800> 1810:(Continue reading)
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