299,792,458 m/s - Speed of light (.8 = 239,833.966 km/s) Speed of light info
149,600,000 km - Earth's orbit away from sun. Orbit info
Therefore circumference of orbit = (pi(d)) 3.14*299,200,000 = ~939,488,000
therefore if the Earth were traveling at 8/10 the speed of light the...