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.