A Rainbow Image of Egg Nebula

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Egg Nebula, also known as CRL 2688 is a bipolar protoplanetary nebula approximately 3,000 light-years away from Earth. Its defining feature is the series of bright arcs and circles surrounding the central star.

A dense layer of gas and dusts enshrouds the central star, blocking its direct light from our view. However, the light from the central star penetrates the thinner regions of this dusty enclosure, illuminating the outer layers of gas to create the arcs seen in the image.

The dusty enclosure around the central star is very likely a disc. The bipolar outflows in the image indicate that the system has angular momentum, which is very likely generated by an accretion disc. In addition, a disc geometry would account for the varying thickness of the enclosure that allows light to escape along the disc's axis and illuminate the outer layers of gas, but still blocks it from our direct view along the disc edge. 

The Egg Nebula was photographed by the Wide Field and Planetary Camera 2 of the Hubble Space Telescope. It emits polarized light which can also be detected visually by a medium-sized telescope.

article reference:- wikipedia.

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