http://starwars.wikia.com/wiki/Shields posted:Deflector shields were first developed during the early years of space exploration, designed to absorb heat and radiation encountered in space and within a planetary atmosphere. Before the introduction of deflector shields, pilots had to rely solely on thick, armored hulls for protection against meteors and laser attacks. More advanced versions of the energy shield were developed centuries later, until eventually modern shielding was able to combine ray and particle protection. Eventually, shield technology improved enough to allow some ground vehicles to have dedicated shield generators