Lexicon

Astronomy : 

Science that studies celestial bodies (like stars, planets or the galaxy) and the universe in its global state, even Earth. It's a science which is to understand the sky and space.

Astrophysicist :

Scientist who study space and celestial bodies to understand how it works with the law of physics.

Pulsar :

Word form from pulsing stars, meaning “star that pulse” It's a very thick star which sends a steady radio wave,like a beacon in space. Those signals repeat themselves regularly.

Radio telescope : 

Something that can intercept radio waves from space to study what’s in it(stars, planets…) It can make us “hear” signals that celestial bodies send.

Stereotype : 

An idea already conceived or a simplified image we have of a group or a type of person, already determined by society standards..

Quasar : 

Luminous object far in the universe. It looks like a star when we look at it, but in reality it's the center of a galaxy where there is a big black hole. A quasar is one of the most luminous object known in space.