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Worried About Comet Elenin? FAQs from Ian Musgrave

With all the huzz a buzz over this newly discovered Comet Elenin, or C/2010 x1 as it is known on star charts, here are some things i found, now unless “they” have told Ian Musgrave he can go to the underground bunkers, i guess he has no reason to lie…………………..

But it’s bigger than Jupiter! No, that’s the coma , the thin haze of gas and dust that surrounds the comet nucleus. The nucleus of C/2010 X1 Elenin is roughly 3-4 Km in diameter and Elenin has a coma around 50,000 km wide at the time of writing (which is a third of the diameter of Jupiter). The average density of the coma is about the same as the density of the atmosphere on the Moon. A coma is a feature of all comets that approach the Sun closely, for example comet 81P Wild (nucleus 4 Km diameter) had a coma of 50,000 Km and 103P Hartley had a coma of 150,000 Km. The Great Comet of 1811 had a nucleus of around 30km in diameter and had a coma nearly as big as the Sun. Comet Halley is 6×15 km and had a coma 100,000 km wide when it last approached Earth. We survived them all (and 103P Hartley came nearly twice as close as Elenin will), and we will survive Elenin without incident.” from http://www.universetoday.com/87619/worried-about-comet-elenin-faqs-from-ian-musgrave/

Worried About Comet Elenin? FAQs from Ian Musgrave

Free software to draw sky charts

http://www.skyviewcafe.com/skyview.php

http://www.sky-map.org/

http://www.stellarium.org/

http://www.google.com/sky/

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http://astroblogger.blogspot.com/2011/03/review-of-stellarium-01061.html

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