... The false-color picture shows the bright infrared emission from dust and molecular gas in part of the Orion star forming region surrounding the Horsehead Nebula . ... The very bright object at the lower left is the reflection nebula NGC 2023, a dense concentration of interstellar gas and dust which is also associated with newly formed stars. ... Publications with keywords: dust - infrared - Horsehead Nebula . Publications with words: dust - infrared - Horsehead Nebula . ... Infrared Andromeda . ...