This color-composite image of the Helix Nebula was created from images obtained using the the Wide Field Imager, an astronomical camera attached to the 2.2 meter Max-Planck Society/ESO telescope ...

In this image from NASA's Spitzer Space Telescope, "cometary knots" on the Helix Nebula show blue-green heads caused by excitation of their molecular material from shocks or ultraviolet radiation.

Orion Nebula: It is a cloud of dust and gas located in the constellation Orion. Thousands of stars are being born there. NGC 281: Dark, dense clumps of gas and dust known as 'Bok globules' can be ...