1. Electromagnetic radiation has been the primary tool of astronomers and astrophysicist since before the first telescope. It is not "neglected" by any stretch

1. Electromagnetic radiation has been the primary tool of astronomers and astrophysicist since before the first telescope. It is not "neglected" by any stretch of the imagination. 2. At large scales, the total number of electrons and protons tend to balance and thus result in electrically neutral objects.