Space is a dangerous environment and presents extremes of both hot and cold for the human explorer. To allow spacesuit cooling (and heating) systems to work most efficiently, they are made of material that reflects much of the incident radiation (mostly sunlight) that falls on them; hence, they are white.

Orange suits

The suit has a Nomex cover layer in international orange color, instead of silver or white as in previous David Clark suits. The orange color allows rescue units to easily spot the astronauts in the case of an Orbiter bailout over the ocean.

Why do astronauts wear two different suits

The different colors of astronaut suits actually serve a purpose and are not just for show. The orange color of the ACES suit is to make the wearer more visible when landing in an emergency. The EVA suit is white because that is the color that best reflects sunlight and helps keep the astronaut cool

All other reasons why they wear orange and white space suits are :

White & Orange Spacesuits

Astronauts wear white and orange suits for various reasons:

1. Visibility: The bright white and orange colors make astronauts highly visible during spacewalks or emergency situations in space. This high visibility helps in locating and identifying them against the backdrop of the dark void of space.
2. Radiation Protection: White suits reflect a significant amount of solar radiation, helping to regulate the temperature inside the suit and protect astronauts from the harsh effects of direct sunlight, which can be extremely intense in space.
3. Thermal Control: The white portion of the suit reflects sunlight, helping to maintain a stable temperature inside the suit, while the orange portions provide additional thermal insulation, particularly during launch and re-entry when temperatures can vary greatly.
4. Tradition: The use of white and orange suits has become a tradition in space exploration, with roots in the early space programs. The iconic orange suits are often associated with launch and re-entry, while the white suits are used for spacewalks and extravehicular activities (EVAs).
5. Easy Identification: The color scheme helps differentiate astronauts during space missions. Orange suits are typically worn during launch and re-entry, while white suits are used for spacewalks, making it easier for crew members to identify each other’s roles.

Overall, the white and orange spacesuit design is a combination of practical considerations for safety, visibility, and temperature control, along with historical and traditional aspects of space exploration.

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