Internet is full of articles and arguements on this topic. This is a topic on which we will never have full proof justification. Science believes in only something that can be proved. However if outcome of an event remains same everytime that doesn't mean scientifically it is proved. However it can be conveniently "taken for granted" if outcomes is same. Likewise only possible proof of palmistry is evaluation of one's own hand from a professional skilled palmist.
Eclipse in its usual meaning is the event when Moon comes in between Earth and Sun casting its shadow over the Earth. For some time we do not get full light of the Sun. This is call Solar Eclipse.
What is your Sun Sign? What is your Rashi? Are they same? In newspaper what do you refer to for weekly predictions - Sun Sign or Rashi?