Apollo Command Module

The Command/Service Module (CSM) was one of two spacecraft, along with the Lunar Module, used for the United States Apollo program which landed astronauts on the Moon. The CSM consisted of two segments: the Command Module, a cabin which housed a crew of three and equipment needed for re-entry and splashdown; and a Service Module that provided propulsion, electrical power and storage for various consumables required during a mission. The Service Module was cast off and allowed to burn up in the atmosphere before the Command Module re-entered and brought the crew home.
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The module was designed to re-enter earths atmosphere which means it will have to withstand temperatures up to 5000 degrees Fahrenheit and keep the people inside safe. The heat shield on the command module had a shiny mirror appearence to reflect mos of the heat away from the inside of the module.
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This picture is a close-up of the heat shield on the command module