I enjoy creating color images from three grayscale images. The post linked here will explain how to create color astronomical images. The colors assigned are not necessarily what the human eye would see, but are used to bring out details. Visit the gallery of previous Astro-Images. Unless otherwise noted, all images are made by me using three original grayscales from the Hubble Legacy Archive.
This is another example of a dying Sun-like star. Each one results in a unique shape and color. The star that made this nebula is in the center. The nebula is located 6500 light years away in the constellation Hercules in the northern skies.
William Herschel discovered this nebula in 1786. It is known by the nickname Cat’s Eye. This view is a closeup at the core. Wider views are spectacular. It has been studied in radio and x-ray wavelengths extensively.
This image is not from the Hubble archive. It is a recent one I requested from the Iowa Robotic Observatory in SE Arizona. I am fortunate to have an account. I submitted a request for this in three wavelengths of red, green, and blue. The plan was to make a composite in color. The automated system on the telescope only returned one image for me to share. It shows a small part in grey of a much larger nebula called the Jellyfish. The IRO has a narrow field of view.
Here is a better image of the Jellyfish from NASA. If you rotate my image 180˚, it fits part of the Jellyfish in the upper right of this image.