Thermal emission is the process by which objects release energy in the form of infrared radiation due to their temperature. All objects emit thermal radiation, and the amount of energy emitted increases with temperature. This phenomenon is described by Planck's Law, which explains how different wavelengths of radiation are emitted based on the object's temperature. This type of emission is crucial in various fields, including astronomy, where it helps scientists understand the temperature and composition of celestial bodies. Additionally, thermal emission plays a significant role in technologies like thermal imaging, which detects heat patterns for applications in security and building inspections.