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Nebula NGC 604
Spiral Galaxy M33
This nOde
last updated October 24th,
2001
and is permanently morphing...
(10 K'an (Lizard) - 2 Zac (White) - 244/260
- 12.19.8.12.4)

At the heart of NGC 604 are
over 200 hot stars, much more massive than our
Sun
(15 to 60 solar masses). They heat the gaseous walls of the nebula making
the gas flouresce. Their
light
also highlights the nebula's three-
dimensional
shape, like a lantern in a cavern. By studying the physical structure of
a giant nebula, astronomers may determine how clusters of massive stars
affect the
evolution
of the interstellar medium of the galaxy. The nebula also yields clues
to its star formation history and will improve understanding of the starburst
process
when a galaxy undergoes a "firestorm" of star formation.
The image was taken on January 17, 1995 with Hubble's
Wide Field and Planetary Camera 2. Separate exposures were taken in different
colors of light to study the physical properties of the hot gas (17,000
degrees Fahrenheit, 10,000 degrees Kelvin).