Southern Pinwheel Galaxy

A photogenic and favorite target for amateur astronomers, the full beauty of nearby spiral galaxy M83 is unveiled in all of its glory in this Hubble Space Telescope mosaic image. The vibrant magentas and blues reveal the galaxy is ablaze with star formation. The galaxy, also known as the Southern Pinwheel, lies 15 million light-years away in the constellation Hydra.

The Hubble photograph captures thousands of star clusters, hundreds of thousands of individual stars, and "ghosts" of dead stars called supernova remnants. The galactic panorama unveils a tapestry of the drama of stellar birth and death spread across 50,000 light-years.

The newest generations of stars are forming largely in clusters on the edges of the dark spiral dust lanes. These brilliant young stellar groupings, only a few million years old, produce huge amounts of ultraviolet light that is absorbed by surrounding diffuse gas clouds, causing them to glow in pinkish hydrogen light.

Gradually, the fierce stellar winds from the youngest, most massive stars blow away the gas, revealing bright blue star clusters and giving a "Swiss Cheese" appearance to the spiral arms. These youngest star clusters are about 1 million to 10 million years old. The populations of stars up to 100 million years or older appear yellow or orange by comparison because the young blue stars have already burned out.

Interstellar "bubbles" produced by nearly 300 supernovas from massive stars have been found in this Hubble image. By studying these supernova remnants, astronomers can better understand the nature of the stars that exploded and dispersed nuclear processed chemical elements back into the galaxy, contributing to the next generation of new stars.

Name

Southern Pinwheel Galaxy

Constellation

Hydra

R.A.

13:37:00.95

Dec.

-29°51'55.51"

Distance

15,000,000 lys

Dimensions

50,000 lys

Release Date

2014-01-09

Instrument

HST > WFC3/UVIS

Resolution

11,405 x 7,419 px

Entropy

7.34

Sharpness

2.36

NASA & STScI

NASA, ESA, and the Hubble Heritage Team (STScI/AURA);

Acknowledgement: W. Blair (STScI/Johns Hopkins University) and R. O'Connell (University of Virginia)

13,600,000,000

15,000,000

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