eli5: Why is white so prevalent in spacecrafts and equipments?

Question

eli5: Why is white so prevalent in spacecrafts and equipments?

In: 101

Answer 1

As stated, it reflects light. But it’s also kind of tradition, so most boosters are also white though they don’t need to reflect light because they won’t be up for long. Maybe because it looks cool standing on the pad. But they don’t need to be. SpaceX boosters are white, but they don’t bother to clean them between launches, so they’re more grey and sooty.