Light-year Light-year The light-year is a unit of length used to express astronomical distances and measures about 9.46 trillion kilometres or 5.88 trillion miles. As defined by the International Astronomical Union (IAU), a light-year is the distance that light travels in vacuum in one Julian year (365.25 days). Because it includes the word "year", the term light-year is sometimes misinterpreted as a unit of time. The light-year is most often used when expressing distances to stars and other distances on a galactic scale, especially in nonspecialist and popular science publications. The unit most commonly used in professional astrometry is the parsec
Fit-PC feature variations, though only 7 models have been announced so far. On September 16, 2008, Compulab announced the Fit-PC Slim, which at 11 x 10 x 3 cm is smaller than fit-PC 1.0. fit-PC Slim uses 500 MHz AMD Geode LX800 processor and has 512mb soldered-on RAM. The computer includes a VGA output, a serial port with a custom connector, Ethernet, b/g WLAN, and 3 USB ports (2 on the front panel). The system has an upgradeable 2.5" 60GB ATA hard drive. fit-PC Slim has General Software BIOS supporting PXE and booting from a USB CDROM or USB thumb drive.