Why does NASA use gold foil on equipment and gold-coated visors?

Gold foil and gold-coated visors help keep things cool when it’s super hot outside, like how you feel when you’re sitting in the sun on a really warm day.

Imagine wearing sunglasses on a bright, sunny day. They block some of that harsh light and keep your eyes from getting too squinty. Gold foil works kind of like those sunglasses for machines. In space, there are no clouds to block the heat, so things can get really hot, hotter than a grilled cheese sandwich in the oven! The gold reflects some of that extra heat away, keeping important parts of NASA’s equipment from getting too hot and breaking.

Think about wearing a visor on your helmet when you’re outside. It helps protect your eyes from bright lights, like how sunglasses help you see better in the sun. Gold-coated visors do something similar for astronauts. They block some of the intense sunlight and heat, so astronauts can see clearly without getting too hot or squinting too much.

It’s like having a special kind of sunglasses that work really well, even up in space!