Star-Birthing Frenzy Lights up Galaxy's Core
This image taken by NASA's Hubble Space Telescope showcases the brilliant core of
one of the most active galaxies in our local neighborhood. The entire core is 5,000 light-years wide.
The galaxy, called NGC 1569, sparkles with the light from millions of newly formed
young stars. NGC 1569 is pumping out stars at a 100 times faster rate than the Milky
Way. This frenzied pace has been almost continuous for the past 100 million years.
The core's centerpiece is a grouping of three giant star clusters, each containing more
than a million stars. (Two of the clusters are so close they appear as one grouping.) The
clusters reside in a large, central cavity. The gas in the cavity has been blown out by the
multitude of massive, young stars that already exploded as supernovae. These explosions
also triggered a violent flow of gas and particles that is sculpting giant gaseous structures.
The sculpted structure at lower right is about 3,700 light-years long.
Huge bubbles of gas, such as the two at left, appear like floating islands. The largest
bubble is about 378 light-years wide and the smallest 119 light-years wide. They are
being illuminated by the radiation from the bright, young stars within them. Some of
those stars are peaking through their gaseous cocoons.
The biggest and brightest objects surrounding the core are stars scattered throughout our
Milky Way Galaxy. The thousands of tiny white dots in the image are stars in the halo of
NGC 1569. The galaxy is 11 million light-years from Earth in the constellation Camelopardalis.
A new analysis of NGC 1569 shows that it is one and a half times farther from Earth than
astronomers thought. The extra distance places the galaxy in the middle of a group of
about 10 galaxies centered on the spiral galaxy IC 342. Gravitational interactions among
the group's galaxies may be compressing gas in NGC 1569 and igniting the star-birthing
Hubble's Wide Field Planetary Camera 2 and Advanced Camera for Surveys made the
observations of NGC 1569 in September 1999, November 2006, and January 2007.
Image Credit: NASA, ESA, the Hubble Heritage Team (STScI/AURA), and A. Aloisi (STScI/ESA)