MadSci Network: Astronomy |
It doesn't matter how big the object is, since anything which has mass can not travel at the speed of light. Even though an object will never reach light speed, light falling upon it does create a pressure, and the bigger the object, the larger the force with which the light can propel it. However, the bigger the object, the more inertia it has, and the harder it is for the light to get it moving.
Try the links in the MadSci Library for more information on Astronomy.