Clone trooper film series and in the "Star Wars" expanded universe media, a number of specialized trooper units are seen, including elite special forces units such as the 'Advanced Reconnaissance Commandos' (ARC troopers), and Null ARCs, who usually work alone. All clone commandos and ARCs were trained by Mandalorian mercenaries; the elite Clone Troopers are known as Shadow Troopers. The style and color of a clone troopers armor often varies depending on their rank, specialization, unit, or environment, for example, the clone troopers on Kashyyyk wear camouflage green scout-style armour whereas the 501st legion wears standard white armor with blue accents. Another
Technology in Star Wars by the US Food and Drug Administration after eight years of testing and development. More recently, scientists have begun to develop artificial skin jackets to cover prosthetic limbs, creating an effect similar to what is seen in the "Star Wars" films. Solar power technology is not too commonly seen in the "Star Wars" universe, used mainly by the Imperial TIE fighter (acronym for Twin Ion Engine). A distinct feature of TIE fighters is that, despite their short range, their two solar panels provide large scales of propulsive energy, as well as powering laser cannons. Similar types of space vehicles, known