The tail of the comet always points straight away from the sun, in antisolar direction. Sometimes the tail trails behind, but sometimes it's perpendicular, and sometimes it's ahead of the comet like a headlight on a railroad locomotive.

One simply runs out of energy as you get old. One doesn't take on new tasks of exploration because it takes an extended period of intense thinking and working on it, and that becomes impractical.

Whenever you have a good idea, it's inevitable some people will criticize it and deny it. Some people will try to prove it's wrong.

Eugene Parker Quotes