RCW 49

RCW 49 is a H II region nebula located 13,700 light years away. It is a dusty stellar nursery that contains more than 2,200 stars and is about 350 light years across.
RCW 49 is recognized as among the brightest and most massive HII regions.
Other designations for the RCW 49 region include NGC 3247 and G29.
The nebula RCW49, shown in infrared light in this image from the Spitzer Space Telescope, is a nursery for newborn stars. Using NASA's Spitzer Space Telescope, astronomers have found in RCW49 more than 300 newborn or 'protostars,' all with circumstellar disks of dust and gas. The discovery reveals that galaxies make new stars at a much more prolific rate than previously imagined. The stellar disks of dust and gas not only feed material onto the growing new stars, but can be the raw material for new planetary systems.
In 2004 an image by the Spitzer Space Telescope in late 2003, was released showing the nebula in infrared wavelengths. This included and image showing the infrared colors mapped to visible light colors : 3.6 microns (blue), 4.5 microns (green), 5.8 microns (orange) and 8 microns (red). It was noted as being almost 14 thousand light years from Earth, and the infrared light could detect the stars obscured by dust clouds. It was estimated at least 200 of the stars in the nebula have dust disks.
The results of observations of the Spitzer Telescope, including the IRAC camera, have been studied leading to the conclusion that the region is a star-forming region.
In 2014, RCW 49 was identified as a bow shock candidate, along with M17 in a study of Extended Red Objects (ERO's) and Stellar Wind Bow Shocks in the Carina nebula.