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(Thread) Shall we talk a bit about #MarsPerseverance 's EDL sequence? Let's start with the parachute. The design is called a disk-gap-band parachute. Picture below is from Tutt, Lowry, 2019. As you can see, there is a disk of fabric, a gap and a band of fabric. Hence the name! 
It's a design already proven on the Viking Mars probes. However, there have been some changes to the original design.
To clarify, a "gore" is a segment of fabric that runs from the center to the rim, shaped somewhat like this:
