Nebulas of the Heart and Soul

Nebula IC 1795

IC 1795 is an emission nebula, which includes a set of colored dust clouds by the glowing gas, environment (right). This small nebula is located in a complex, much larger emission nebulae, known as the nebula's heart and soul (pictured against). It is a region of star formation, located in the northern constellation Cassiopeia. The false color of the nebula are returned by broadband filters, used in the right image, taken by the Hubble Space Telescope. Blue represents the emission of oxygen, green, those of hydrogen, and red, those of sulfur. IC 1795 magnitude 7, is close to its neighbor, IC 1805, the Heart Nebula, is located about 6 000 light years from the solar system, in the Perseus arm of the Milky Way.

NB: The emission nebulae consist of clouds of gas (neutral or ionized) emitting light in different colors.
The young, hot stars, which are in the clouds, produce high-energy photons.
This intense radiation excites the atoms of the cloud, which in turn emit light (photons).

Image: The two nebulas of the Heart and Soul, IC 1805 (right) and IC 1848 (left) are the largest in this picture. The nebula IC 1795 is the small nebula in the upper right of IC 1805 and IC 1871 is to the left of IC 1848.

Image: The central region of the nebula IC 1795, is highly colored by broadband filters. The blue emission of oxygen, green for those of hydrogen, and red for sulfur. This photo was taken by the Hubble Space Telescope.

Nebula heart, IC 1805

IC 1805, dubbed the Heart Nebula is an emission nebula located about 7 500 light years away in the constellation Cassiopeia. It covers an area of about 60 arc minutes, which is approximately 200 light years. In the central regions of the nebula IC 1805, the dust clouds have fantastic shapes. The clouds are actually sculpted by stellar winds and radiation from a variety of hot massive stars. These stars are part of a star cluster (Melotte 15), newly created. Young as 1.5 million years, the stars of the cluster are clearly visible in this picture very colorful.
The dark clouds of dust are silhouetted against the background gas very bright.
This mosaic image was taken with narrow band filters, the view extends over about 40 light years and shows the emission of hydrogen, green, those of sulfur, red and oxygen in shades of blue.

Wide-field images of the nebula reveal a shape resembling a heart. This resemblance has given him the "Heart Nebula".

Image: Heart Nebula, IC 1805. IC 1805 lies about 7500 light-years away in the constellation Cassiopeia.
Image: Derek Santiago.