Geek Fact for September 11th


In 1877, English mathematician and astronomer James Jeans was born.

One of Jeans’ major discoveries, named Jeans length, is a critical radius of an interstellar cloud in space. It is a function of the temperature and density of the cloud as well as the mass of the particles composing the cloud. A cloud that is smaller than its Jeans length will not have sufficient gravity to overcome the repulsive gas pressure forces and condense to form a star. A cloud that is larger than its Jeans length will collapse.

Learn more at http://en.wikipedia.org/wiki/James_Hopwood_Jeans.

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Judy Novotny

Judy is a computer veteran with 30 years of experience. She has owned everything from a TRS-80, Apple IIe and various Windows-based PCs. She is currently living in her Apple ecosystem at home consisting of an iPhone, iPad, iMac, MacBook, Apple TV, iPod nano and two Time Capsules. She is a fan of all things mobile since she got her first Palm Pilot in 1999. Check out her iPad app, Number Wizard, in the App Store. Follow her on Twitter @junovotech or at Junovo.com.