\section{What is a meteor shower?}
Meteor showers occur when the Earth's orbit intercepts the dusty trail of periodic comets. Comets are dirty ice-balls coming from the cold periphery of the Solar system, captured in eccentric orbits around the Sun. When getting closer to our star, they melt slowly, releasing gas and dust which make the comet visible (those beautiful comet tails). The dusty leftover of the comet pave the comet's orbit. When the Earth comes close to one of these dusty cometary highways, the particles can be captured by the planet's gravity and fall towards the surface. This creates the meteor shower, which repeats every time the crossing occurs, that is once per year.
