Speed of light they appeared 13 billion years ago, when the universe was less than a billion years old. The fact that more distant objects appear to be younger, due to the finite speed of light, allows astronomers to infer the evolution of stars, of galaxies, and of the universe itself. Astronomical distances are sometimes expressed in light-years, especially in popular science publications and media. A light-year is the distance light travels in one year, around 9461 billion kilometres, 5879 billion miles, or 0.3066 parsecs. In round figures, a light year is nearly 10 trillion kilometres or nearly 6 trillion miles. Proxima Centauri,
Fit-PC It is pre-installed with either Windows Vista or with Ubuntu 8.10 and Gentoo Linux 2008.0 . Also Windows Embedded can be used, or pre-installed on a FlowDrive. The fit-PC Slim end-of-life was announced on 19 June 2009 with the general availability of fit-PC2. fit-PC 1.0 is an earlier model that has the following differences Fit-PC The fit-PC is a small, light, fan-less nettop computer manufactured by the Israeli company CompuLab. Many fit-PC models are available. fit-PC 1.0 was introduced in July 2007, fit-PC Slim was introduced in September 2008, fit-PC 2 was introduced in May 2009, fit-PC 3 was introduced