Archive for October, 2008

Installing a 2kw Photo-voltaic system, a new adventure

First step on the way to a 2kw photovoltaic system.

October 5, 2008 Tags: climate change, renewable energy, solar power Posted in: Environment, Renewable Energy No Comments

Hot, Flat, and Crowded — a new book from Thomas Friedman

Hot, Flat, and Crowded — a way out of oil’s grip on our lives.

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October 5, 2008 Tags: Environment Posted in: Environment Comments Closed

NASA Image of the Day

A Chameleon Sky

The sands of time are running out for the central star of this the Hourglass Nebula. With its nuclear fuel exhausted, this brief, spectacular, closing phase of a sun-like star's life occurs as its outer layers are ejected and its core becomes a cooling, fading white dwarf. In 1995, astronomers used the Hubble Space Telescope to make a series of images of planetary nebulae, including the one above. Here, delicate rings of colorful glowing gas (nitrogen-red, hydrogen-green, and oxygen-blue) outline the tenuous walls of the 'hourglass.' The unprecedented sharpness of Hubble's images revealed surprising details of the nebula ejection process and may resolve the outstanding mystery of the variety of complex shapes and symmetries of planetary nebulae. Image Credit: NASA, WFPC2, HST, R. Sahai and J. Trauger (JPL)
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Archive for October, 2008

Installing a 2kw Photo-voltaic system, a new adventure

Hot, Flat, and Crowded — a new book from Thomas Friedman

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