* About 1500 stars are visible at night with the naked eye in a clear, dark sky. There are 88 canstellations altogether; the smallest star measuring about 1700km across, it is a white dwarf called LP 327-16!
* In ancient Rome only important people wore purple clothes; this is because the purple dye came from a particular kind of shellfish and was very expensive!
* Lava from an erupting volcano may be as hot as 1200 degrees celsius!
* Some of the oldest mountains in the world are located in Scotland; they are estimated to be about 400 million years old!
* Blue whales weigh up to 7 tonnes at birth!
Saturday, May 8, 2010
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