A NASA Hubble Space Telescope "family portrait" of young, ultra-bright
stars nested in their embryonic cloud of glowing gases. The celestial
maternity ward, called N81, is located 200,000 light-years away in the
Small Magellanic Cloud (SMC), a small irregular satellite galaxy of our
Milky Way. Hubble's exquisite resolution allows astronomers to pinpoint
50 separate stars tightly packed in the nebula's core within a 10 light-
year diameter - slightly more than twice the distance between earth and
the nearest star to our sun. The closest pair of stars is only 1/3 of a
light-year apart (0.3 arcseconds in the sky). This furious rate of mass
loss from these super-hot stars is evident in the Hubble picture that
reveals dramatic shapes sculpted in the nebula's wall of glowing gases
by violent stellar winds and shock waves. A pair of bright stars in the
center of the nebula is pouring out most of the ultraviolet radiation to
make the nebula glow. Just above them, a small dark knot is all that is
left of the cold cloud of molecular hydrogen and dust the stars were
born from. Dark absorption lanes of residual dust trisect the nebula.
The nebula offers a unique opportunity for a close-up glimpse at the
firestorm' accompanying the birth of extremely massive stars, each
blazing with the brilliance of 300,000 of our suns. Such galactic
fireworks were much more common billions of years ago in the early
universe, when most star formation took place. The "natural- color" view
was assembled from separate images taken with the Wide Field and
Planetary Camera 2, in ultraviolet light and two narrow emission lines
of ionized Hydrogen (H-alpha, H-beta).
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