Anne’s Picture of the Day: Emission Nebula IC 1795
read more at Anne’s Astronomy News http://annesastronomynews.com/
January 23, 2013
IC 1795, an emission nebula in Cassiopeia
Image Credit & Copyright: Ken Crawford, Rancho Del Sol Observatory (http://www.imagingdeepsky.com)
IC 1795 (nicknamed the Fishhead Nebula or Northern Bear Nebula) is a bright emission nebula of about 70 light-years across with glowing gas and dark lanes of obscuring dust, located just over 6,000 light-years away from Earth in the northern constellation of Cassiopeia. The brighter region of the nebula is designated NGC 896.
It is part of a complex of star forming regions that lies at the edge of a large molecular cloud called W3, along the Perseus spiral arm of our Milky Way, where star formation is most actively still going on. IC 1795 is located right at the tip of the heart in the famous Heart Nebula (IC 1805).
The stars inside IC 1795, energizing the nebula and making it glow, have not yet emerged from their natal cocoon. In other words, we can’t see the massive stars lighting up this nebula. This suggests that the stars inside are very young, on the order of millions of years. That is young in comparison to stars like the Sun, which is nearly 5 billion years old. These stars are also probably quite massive, since the nebula is so prominent and bright.
IC 1795 is recognized as being a very strong source of radio emissions.
This deep image was created with the light energy from six different filters.
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2013-01-23 06:15:32
Source: http://annesastronomynews.com/annes-picture-of-the-day-emission-nebula-ic-1795/
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