Buy this Hubble Horsehead Nebula space photo.
High quality Hubble picture, slide, or Duratrans backlit transparency. NASA photograph H2013-12a. Wide variety of sizes. Click to see selection as Astronomy Picture of the Day (APOD) - April 22, 2013
Hubble Sees a Horsehead of a Different Color.
Looking like an apparition rising from whitecaps of interstellar foam, the iconic Horsehead Nebula has graced astronomy
books ever since its discovery over a century ago. The nebula is a favorite target for amateur and professional
In this new Hubble Space Telescope view, the nebula appears in a new light, as seen in infrared wavelengths. The
nebula, shadowy in optical light, appears transparent and ethereal when seen in the infrared, represented here with
visible shades. The rich tapestry of the Horsehead Nebula pops out against the backdrop of Milky Way stars and distant
galaxies that are easily seen in infrared light.
The Horsehead was photographed in celebration of the 23rd anniversary of the launch of Hubble aboard the space
shuttle Discovery. Over its two decades of producing ground-breaking science, Hubble has benefited from a slew of
upgrades, including the 2009 addition of a new imaging workhorse: the high-resolution Wide Field Camera 3 that was
used to take this portrait of the Horsehead.
The backlit wisps along the Horsehead's upper ridge are being illuminated by Sigma Orionis, a young five-star system
just off the top of the Hubble image. A harsh ultraviolet glare from one of these bright stars is slowly evaporating the
nebula. Along the nebula's top ridge, two fledgling stars peek out from their now-exposed nurseries.
Gas clouds surrounding the Horsehead have already dissipated, but the tip of the jutting pillar contains a slightly higher
density of hydrogen and helium, laced with dust. This casts a shadow that protects material behind it from being photo-
evaporated, and a pillar structure forms. Astronomers estimate that the Horsehead formation has about five million years
left before it too disintegrates.
The Horsehead Nebula is part of a much larger complex in the constellation Orion. Known collectively as the Orion
Molecular Cloud, it also houses other famous objects such as the Great Orion Nebula (M42), the Flame Nebula, and
Barnard's Loop. At about 1,500 light-years away, this complex is one of the nearest and most easily photographed
regions in which massive stars are being formed.
Hubble's pairing of infrared sensitivity and unparalleled resolution offers a tantalizing hint of what the upcoming James
Webb Space Telescope, set for launch in 2018, will be able to do.
Date Released: April 19, 2013
Credit: NASA, ESA, and the Hubble Heritage Team (STScI/AURA)