The Wise telescope instead looks at the infrared light emitted from space rocks, which is related to the temperature of the object.

BBC: Asteroid thought to kill dinosaurs may not be guilty

Electrostatic self-assembly, however, coats every exposed surface of an object, and does it at room temperature.

ECONOMIST: MONITOR

Each sensor, which is shaped like a hexagon and is about twice as thick as a hockey puck, is capable of monitoring the temperature, humidity and barometric pressure of virtually any object you can think of.

ENGADGET

When heated to a high temperature, the bath gives off a mist of atoms that fall on to the surface of the object.

ECONOMIST: MONITOR