Wisps Surrounding the Horsehead Nebula . ... Credit Copyright: Star Shadows Remote Observatory Explanation: The famous Horsehead Nebula in Orion is not alone. ... To bring out details of the Horse head's pasture, amateur astronomers at the Star Shadow Remote Observatory in New Mexico , USA fixed a small telescope on the region for over seven hours filtering out all but a very specific color of red light emitted by hydrogen . They then added the image to a full color frame taken over three hours. ...