The iconic Horsehead Nebula is a staple of modern astronomy. Discovered more than 100 years ago, the nebula is a favorite target for amateur astronomers. The nebula is visible from Earth if using the proper eyepiece and a hydrogen beta filter.
Shadowy in optical light when seen at infrared wavelengths, Horsehead is captivating against the backdrop of the Milky Way.
On the 23rd anniversary of its launch aboard the space shuttle Discovery on April 24, 1990, the Hubble space telescope returned a new infrared light image of the billowing cloud.
In 2009, the addition of a new imaging tool, the high-resolution Wide Field Camera 3, made this portrait of the Horsehead possible.
April 24, 2013 5:05 PM PDT
Photo by: ESA, and the Hubble Heritage Team (STScI/AURA),NASA