In a small galaxy lies a luminous cloud of gas and dust,
called a nebula, which houses a family of newborn stars. If not
for the death of a massive star millions of years ago, this
stellar nursery never would have formed.
The nebula, Henize 2006, and the remnants of the exploding star
that created it, is pictured in superb detail in a new image
from NASA’s Spitzer Space Telescope. Henize 206 sits just
outside our own galaxy, the Milky Way, in a satellite galaxy
163,000 light-years away called the Large Magellanic Cloud. It
is home to hundreds and possibly thousands of stars, ranging in
age from two to 10 million years old.
“The image is a wonderful example of the cycle of birth and
death that gives rise to stars throughout the universe,” said
Dr. Varoujan Gorjian, a scientist at NASA’s Jet Propulsion
Laboratory (JPL), Pasadena, Calif., and principal investigator
for the latest observation.
As in other stellar nurseries, the stars were created when a
dying star, or supernova, exploded, shooting shock waves
through clouds of cosmic gas and dust. The gas and dust were
subsequently compressed, gravity kicked in, and stars were
born. Eventually, some of the stars will die in a fiery blast,
triggering another cycle of birth and death. This recycling of
stellar dust and gas occurs across the universe. Earth’s own
sun descended from multiple generations of stars.
The new Spitzer picture provides a detailed snapshot of this
universal phenomenon. By imaging Henize 206 in the infrared,
Spitzer was able to see through blankets of dust that dominate
visible light views. The resulting false-color image shows
embedded young stars as bright white spots, and surrounding gas
and dust in blue, green and red. Also revealed is a ring of
green gas, which is the wake of the ancient supernova’s
explosion.
“Before Spitzer, we were only seeing tantalizing hints of the
newborn stars peeking through shrouds of dust,” Gorjian said.
These observations provide astronomers with a laboratory for
understanding the early universe, stellar birth and death
cycles. Unlike large galaxies, the Large Magellanic Cloud has a
quirk. The gas permeating it contains roughly 20 to 50 percent
of the heavier elements, such as iron, possessed by the sun and
gas clouds in the Milky Way. This low-metallicity state
approximates the early universe, allowing astronomers to catch
a glimpse of what stellar life was like billions of years ago,
when heavy metals were scarce.
Henize 206 was first catalogued in the early 1950s by Dr. Karl
Henize (pronounced Hen-eyes), an astronomer who became a NASA
astronaut. He flew aboard the Challenger Space Shuttle in 1985.
He died in 1993 at age 66 while climbing Mount Everest.
Launched on August 25, 2003, from Cape Canaveral, Fla., the
Spitzer Space Telescope is the fourth of NASA’s Great
Observatories. The program includes the Hubble Space Telescope,
Chandra X-ray Observatory and Compton Gamma Ray Observatory.
JPL manages the Spitzer Space Telescope mission for NASA’s
Office of Space Science, Washington. Science operations are
conducted at the Spitzer Science Center at the California
Institute of Technology in Pasadena.
For information about NASA and agency exploration programs on
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The Spitzer picture is available on the Internet at:
http://www.spitzer.caltech.edu and
http://photojournal.jpl.nasa.gov
For information about the Spitzer Space Telescope on the
Internet, visit:
