An aeroshell is a rigid heat-shielded shell that protects a vehicle from pressure and heat created by drag during atmospheric entry (see blunt body theory), slows it down during entry, and may protect it from debris during spaceflight. The back shell carries the load being delivered, along with important components such as a parachute, rocket engines, and monitoring electronics like an inertial measurement unit that monitors the orientation of the shell during parachute-slowed descent.

1. The aeroshell is crucial for protecting the spacecraft during re-entry.
   氣動外殼對航天器在重返大氣層時的保護至關重要。
2. Engineers tested the aeroshell to ensure it can withstand high temperatures.
   工程師測試了氣動外殼，以確保它能承受高溫。