Know about Astrophysics:- The Sun:   The Sun is our closest star and the source of all life on Earth.  Astrophysicists study the Sun's atmosphere, its magnetic field, and its evolution. Opens in a new window sun.ethz.ch Opens in a new window eos.org Stars:   Stars are giant balls of gas that produce heat and light through nuclear fusion.  Astrophysicists study the formation, evolution, and death of stars. Opens in a new window web.gps.caltech.edu Galaxies:   Galaxies are large groupings of stars, gas, and dust.  Astrophysicists study the formation, evolution, and interactions of galaxies. Opens in a new window www.elisascience.org Black holes:   Black holes are incredibly dense objects with gravity so strong that nothing, not even light, can escape.  Astrophysicists study the properties and behavior of black holes. Opens in a new window www.wired.com Dark matter:   Dark matter is a mysterious substance that makes up about 85% of the ma...