Unidentified infrared emission
= Unidentified infrared emission
{wiki=Unidentified_infrared_emission}
Unidentified Infrared Emission (UIR) refers to a series of broad and relatively weak emission features observed in the infrared spectrum, particularly in the context of astronomical observations. These features are typically detected in the infrared spectrum of various astronomical objects, including star-forming regions, planetary nebulae, and the interstellar medium.