亜光速 | [あこうそく, akousoku] (n) near light speed; sublight speed [Add to Longdo] |
Twilight spectrum | สเปคตรัมยามสนธยา [อุตุนิยมวิทยา] |
speed of light | (n) the speed at which light travels in a vacuum; the constancy and universality of the speed of light is recognized by defining it to be exactly 299, 792, 458 meters per second, Syn. light speed, c |
亜光速 | [あこうそく, akousoku] (n) near light speed; sublight speed [Add to Longdo] |