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NGC 7635 (Bubble Nebula), Sh2-159, NGC 7538
Credit: Emil Ivanov
The Bubble Nebula (NGC 7635, Sharpless 162, or Caldwell 11), is an emission nebula in the constellation Cassiopeia. The “bubble” is created by the stellar wind from a massive central star,SAO 20575 (estimated mass 10-40 Solar masses). The adjacent giant molecular cloud contains the expansion of the bubble nebula while itself being excited by the hot central star, causing it to glow. Below the Bubble Nebula is the emission nebula Sharpless 159. This H II region, contains within it a very compact source of radio waves, which coincides with the densest part of the cloud, and surrounds a star of spectral type O9, which is the main source of ionization of gases in the region. At the upper left corner is another emission nebula - NGC 7538. This is one of the regions of intense star formation easier to observe, due to the fact that it is obscured by dust and dark clouds.The main source of gas ionization in this cloud is the biggest yet discovered protostar which is about 300 times the size of our Solar System.
The Carina Nebula
The spectacular star-forming Carina Nebula has been captured in great detail by the VLT Survey Telescope at ESO’s Paranal Observatory. This picture was taken with the help of Sebastián Piñera, President of Chile, during his visit to the observatory on 5 June 2012 and released on the occasion of the new telescope’s inauguration in Naples on 6 December 2012.
Acknowledgement: VPHAS+ Consortium/Cambridge Astronomical Survey Unit
Illustration Credit: NASA Ames / SETI Institute / JPL-Caltech, Discovery: Elisa V. Quintana, et al.
Explanation:Planet Kepler-186f is the first known Earth-size planet to lie within the habitable zone of a star beyond the Sun. Discovered using data from the prolific planet-hunting Kepler spacecraft, the distant world orbits its parent star, a cool, dim, M dwarf star about…
The Carina Nebula’s hidden secrets
This broad image of the Carina Nebula, a region of massive star formation in the southern skies, was taken in infrared light using the HAWK-I camera on ESO’s Very Large Telescope. Many previously hidden features, scattered across a spectacular celestial landscape of gas, dust and young stars, have emerged.
Credit: ESO/T. Preibisch