These images from NASA's Spitzer Space Telescope of Comet ISON were taken on June 13, 2013, when ISON was 312 million miles (502 million kilometers) from the sun. The lefthand image shows a tail of fine rocky dust issuing from the comet, blown back by the pressure of sunlight. The image at right shows a neutral gas atmosphere surrounding ISON, likely created by carbon dioxide fizzing off the comet at a rate of 2.2 million pounds per day.
Fire rainbows are the rarest of all naturally occurring atmospheric phenomena. For a fire rainbow to occur, cirrus clouds must be 20,000 feet in the air with the precise amount of ice crystals, and the sun must hit the clouds at 58 degrees
This NASA Hubble Space Telescope image of Comet ISON was taken on April 10, 2013, when the comet was slightly closer than Jupiter's orbit at a distance of 386 million miles from the sun (394 million miles from Earth).
Ghost of Jupiter Nebula
Ghost of Jupiter Nebula | This planetary nebula from NASA's Spitzer Space Telescope shows the disembodied remains of a dying star, when its outer layers have sloughed off and are lit up by ultraviolet light from the central star. The Ghost of Jupiter, NGC 3242, is located 1,400 light-years away in the constellation Hydra. Spitzer's infrared view shows the cooler outer red halo of the dying star, and concentric rings around the object, the result of material being periodically tossed out.