Space lubricants challenges

In the vacuum of space, traditional liquid lubricants would instantly evaporate or freeze, so spacecraft and satellites use special solid lubricants like molybdenum disulfide or even gold plating on moving parts. The International Space Station's robotic arm joints use these exotic materials because there's no air to carry away heat, meaning friction can cause extreme temperature spikes that would destroy regular oils. Some space mechanisms also use "self-lubricating" materials where tiny particles break off during movement to create a slippery layer. Without gravity, any liquid lubricant would float away rather than staying in place, creating a cloud of droplets that could damage sensitive electronics.