We know many things, but there are many things of which we can never
think of. We don't know how many planets we have in this whole universe,
we don't know many facts about our galaxy. Similarly, there are many
other questions which always come into our mind, but we just forget them
as we cannot do anything about it. There is a separate branch for the
study of all these things called Astronomy, more specifically
astrophysics, which is branch of astronomy.Astrophysics deals with the
physics of the universe. It includes the study of the temperature,
density, pressure, chemical composition of various bodies like stars,
planets, galaxies, etc. In the study of these things, there is a great
requirement of knowledge of other subjects also. These subjects include
thermodynamics for heat and temperature issues, electromagnetism for
different properties of the bodies, statistics for the calculations and
interpretations, and many other subjects.An astrophysics person is
responsible for providing right information. There are many universities
which are providing detailed courses in astrophysics. It is all on the
interest of the student whether he wants to join it or not. The subject
is very challenging as it involves theoretical as well as observational
knowledge of the subject. The subject is not limited to any book as the
universe is very vast. Even if someone works for the whole lifetime, he
will not be able to learn and know everything. The universe is
continuously giving challenges and the astrophysics people are accepting
them.
http://ezinearticles.com/?What-is-Astrophysics?&id=3340551