Definition of astrophysics
Astrophysics is defined as the branch of astronomy that employs the principles of physics and chemistry “to ascertain the nature of the astronomical objects, rather than their positions or motions in space”.
Astrophysicists use the principles of physics to study the sun, stars and their evolution, galaxies and their evolution, the exoplanets, intergalactic medium, and the cosmic microwave background radiation. The most important tool to decode the universe is the electromagnetic spectrum. So astrophysicists analyze the spectrum of these systems & thus understand their dynamics. Topics such as dark energy, dark matter, and gravitational waves fall under modern astrophysics. Let us now look at some events that changed the face of this subject.