North is to the top.
The colors in the top
image follow the spirit of the Hubble Palette. The SII data are
mapped to the red channel, the Ha to the green and the 0II data are
mapped to the blue channel. The three color channels were stretched
to similar levels. This clearly shows the areas for the three
The second image uses
the same color palette and was processed to show the popular gold and
Sprawling across hundreds of light-years, emission nebula IC 1805 is
a mix of glowing interstellar gas and dark dust clouds. Only about
7,500 light-years away, stars were born in this region, nicknamed
the Heart Nebula. Light from this and other glowing gas clouds
surrounding hot, young stars comes in very narrow bands of emission
characteristic of energized atoms within the clouds. The top image
shows the light from sulfur atoms in red hues, with hydrogen in
green, and oxygen atoms in blue.