Документ взят из кэша поисковой машины. Адрес оригинального документа : http://www.arcetri.astro.it/~palla/ANDREAIMMAGINI/Galassie/NGC253.txt Дата изменения: Sun Mar 4 20:52:46 2001 Дата индексирования: Sat Dec 22 08:31:24 2007 Кодировка: Поисковые слова: spiral galaxy

PHOTO RELEASE NO.: STScI-PRC95-10
FOR RELEASE: February 20, 1995

HUBBLE PROBES THE VIOLENT BIRTH OF STARS
IN GALAXY NGC 253

[Left]
An image of the spiral galaxy NGC 253, taken with a ground-based
telescope. The galaxy is located about 8 million light-years away in
the constellation Sculptor.

Credit: Jay Gallagher (University of Wisconsin-Madison),
Alan Watson (Lowell Observatory, Flagstaff, AZ), and NASA


[Right]
This NASA Hubble Space Telescope image of the core of the nearest
starburst spiral galaxy, NGC 253, reveals violent star formation
within a region 1,000 light-years across. A starburst galaxy has an
exceptionally high rate of star birth, first identified by its excess
of infrared radiation from warm dust. Hubble's high resolution allows
astronomers to quantify complex structures in the starburst core of the
galaxy for the first time, including luminous star clusters, dust lanes
which trace regions of dense gas and filaments of glowing gas. Hubble
identifies several regions of intense star formation, which include a
bright, super-compact star cluster. These observations confirm that
stars are often born in dense clusters within starbursts, and that
dense gas coexists with and obscures the starburst core. This image
was taken with Hubble's Wide Field Planetary Camera 2 (in PC mode).

Credit: Carnegie Institution of Washington