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Starburst Cluster Shows Celestial Fireworks
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Name:  NGC 3603
Description:  Giant star-forming nebula with massive young stellar clusters
Position (J2000):  R.A. 11h 15m 9s.10   Dec. -61° 16' 17".00
Constellation:  Carina
Distance:  Approximately 20,000 light-years (6,100 parsecs) away.
Dimensions:  This image is roughly 3 arcminutes (17 light-years or 5 parsecs) wide.
Instrument:  WFC3/UVIS and WFC3/IR
Exposure Date(s):  August 27, 2009 and December 3, 2009
Exposure Time:  5.3 hours
Image Credit:  NASA, ESA, R. O'Connell, F. Paresce, E. Young, the WFC3      Science Oversight Committee & the Hubble Heritage Team (STScI/AURA)
Release Date:  July 6, 2010

Other images:  S9920   S9946   S0734   S1004   S1005   S1022
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Like a July 4 fireworks display, a young, glittering collection of stars looks like an aerial burst. The cluster is surrounded by clouds of interstellar gas and dust—the raw material for new star formation. The nebula, located 20,000 light-years away in the constellation Carina, contains a central cluster of huge, hot stars, called NGC 3603.

This environment is not as peaceful as it looks. Ultraviolet radiation and violent stellar winds have blown out an enormous cavity in the gas and dust enveloping the cluster, providing an unobstructed view of the cluster.

Most of the stars in the cluster were born around the same time but differ in size, mass, temperature, and color. The course of a star's life is determined by its mass, so a cluster of a given age will contain stars in various stages of their lives, giving an opportunity for detailed analyses of stellar life cycles. NGC 3603 also contains some of the most massive stars known. These huge stars live fast and die young, burning through their hydrogen fuel quickly and ultimately ending their lives in supernova explosions.

Star clusters like NGC 3603 provide important clues to understanding the origin of massive star formation in the early, distant universe. Astronomers also use massive clusters to study distant starbursts that occur when galaxies collide, igniting a flurry of star formation. The proximity of NGC 3603 makes it an excellent lab for studying such distant and momentous events.

This Hubble Space Telescope image was captured in August 2009 and December 2009 with the Wide Field Camera 3 in both visible and infrared light, which trace the glow of sulfur, hydrogen, and iron.

Color:    The image is a composite of separate exposures made by the WFC3 instrument on the Hubble Space Telescope. Five filters were used to sample broad and narrow wavelength ranges. The color results from assigning different hues (colors) to each monochromatic image. In this case, the assigned colors are:

          F128N (Paschen-beta) yellow     F164N ([Fe II]) red     F555W (V) white     F656N (H-alpha) green     F673N ([S II])