- 15 million light-years away
- 40 percent the size of the Milky Way
- Home to 6 recently spotted exploding stars
The European Southern Observatory (ESO) has released a beautiful image of the nearby galaxy Messier 83 taken by the HAWK-I instrument on ESO’s Very Large Telescope (VLT) at the Paranal Observatory in Chile.
The picture shows the galaxy in infrared light and demonstrates the impressive power of the camera to create one of the sharpest and most detailed pictures of Messier 83 ever taken from the ground.
Messier 83 is about 15 million light-years away. It is over 40,000 light-years wide, only 40 percent the size of the Milky Way, but in many ways is quite similar to our home galaxy, both in its spiral shape and the presence of a bar of stars across its centre.
The galaxy is famous among astronomers for its many supernovae: vast explosions that end the lives of some stars. Over the last century, six supernovae have been spotted in Messier 83 — a record number that is matched by only one other galaxy.
Even without supernovae, Messier 83 is one of the brightest nearby galaxies, visible using just binoculars.
When viewed in infrared light by HAWK-I, most of the obscuring dust that hides much of Messier 83 becomes transparent. The brightly lit gas around hot young stars in the spiral arms is also less prominent in infrared pictures. As a result much more of the structure of the galaxy and the vast hordes of its constituent stars can be seen.
This clear view is important for astronomers looking for clusters of young stars, especially those hidden in dusty regions of the galaxy. Studying such star clusters was one of the main scientific goals of these observations. The acute vision of HAWK-I reveals far more stars within the galaxy.
Adapted from information issued by ESO / M. Gieles / Mischa Schirmer.