V0.1 - 22-06-2020
Parachutes are part of the descent stage of most EDL operations. They are a cheap, lightweight, reliable option with flight heritage as opposed to auto-rotation or powered Descent. The main function of a parachute is to decelerate the vehicle or payload. Other functions can include stabilisation, control and parachute extraction. Depending on their function, parachutes can be called main parachute, drogue parachute, programmer chute or pilot chute. Parachutes also provide an object to grab onto for mid-air recovery.
Overview of a typical parachute system 
Parachutes can generally be divided into five different types:
For the solid and slotted parachutes, there are several sub-divisions and combinations possible. These are to focus either on a specific regime during flight or to improve on previous designs. For the solid textile parachutes, the following sub-designs can be distinguished.
For the slotted parachutes mostly four variations are used:
Parachutes are used widely for landing men and materials, both here on Earth and to land vehicles on Mars and other extra-terrestrial places like Saturn’s moon Titan. They are usually cheap and simple to produce. They are lightweight and do not have to require complex control systems.
However, parachutes also come with downsides. Most of them have to do with the fact that parachutes have to deploy and inflate. This is a very chaotic moment and is very hard to model. This inflation besides being chaotic can also create huge loads which need to be absorbed by the rest of the vehicle it is attached to.