Credit for Hubble image: NASA, ESA, R. O'Connell (University of Virginia), B.
Whitmore (Space Telescope Science Institute), M. Dopita (Australian
National University), and the Wide Field Camera 3 Science Oversight
Hubble image showcases star birth in M83, the Southern Pinwheel
The spectacular new camera installed on NASA's Hubble Space Telescope during
Servicing Mission 4 in May has delivered the most detailed view of star birth
in the graceful, curving arms of the nearby spiral galaxy M83.
Nicknamed the Southern Pinwheel, M83 is undergoing more rapid star
formation than our own Milky Way galaxy, especially in its nucleus. The
sharp "eye" of the Wide Field Camera 3 (WFC3) has captured hundreds of
young star clusters, ancient swarms of globular star clusters, and
hundreds of thousands of individual stars, mostly blue supergiants and
The image at right is Hubble's close-up view of the myriad stars near
the galaxy's core, the bright whitish region at far right. An image of the
entire galaxy, taken by the European Southern Observatory's Wide Field
Imager on the ESO/MPG 2.2-meter telescope at La Silla, Chile, is shown
at left. The white box outlines Hubble's view.
WFC3's broad wavelength range, from ultraviolet to near-infrared,
reveals stars at different stages of evolution, allowing astronomers to
dissect the galaxy's star-formation history.
The image reveals in unprecedented detail the current rapid rate of star birth
in this famous "grand design" spiral galaxy. The newest generations of stars are
forming largely in clusters on the edges of the dark dust lanes, the backbone of
the spiral arms. These fledgling stars, only a few million years old, are
bursting out of their dusty cocoons and producing bubbles of reddish glowing
The excavated regions give a colorful "Swiss cheese" appearance to the spiral
arm. Gradually, the young stars' fierce winds (streams of charged
particles) blow away the gas, revealing bright blue star clusters. These stars are about 1 million to 10 million years old. The older populations
of stars are not as blue.
A bar of stars, gas, and dust slicing across the core of the galaxy may
be instigating most of the star birth in the galaxy's core. The bar
funnels material to the galaxy's center, where the most active star
formation is taking place. The brightest star clusters reside along an
arc near the core.
The remains of about 60 supernova blasts, the deaths of massive stars,
can be seen in the image, five times more than known previously in this
region. WFC3 identified the remnants of exploded stars. By studying these
remnants, astronomers can better understand the nature of the progenitor stars,
which are responsible for the creation and dispersal of most of the galaxy's
M83, located in the Southern Hemisphere, is often compared to M51,
dubbed the Whirlpool galaxy, in the Northern Hemisphere. Located 15
million light-years away in the constellation Hydra, M83 is two times
closer to Earth than M51.
Credit for ground-based image: European Southern Observatory
The Hubble Space Telescope is a project of international cooperation between NASA and the European Space Agency. Goddard manages the telescope. The Space Telescope Science Institute conducts Hubble science operations. The institute is operated for NASA by the Association of Universities for Research in Astronomy, Inc. in Washington, and is an International Year of Astronomy 2009 program partner.
Images and more information about M83 are available at:
› Space Telescope Science Institute
› NASA Hubble page
› Series of STSI images zooming in on M83
Space Telescope Science Institute