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    Galaxy's Ghostly Arms Finally Explained Credit: NASA/CXC/Univ. of Maryland/A.S. Wilson et al. Optical: Pal.Obs. DSS; IR: NASA/JPL-Caltech; VLA & NRAO/AUI/NSFIn this composite image of spiral galaxy M106, optical data is shown as yellow, radio data from the Very Large Array appears as purple, X-ray data from Chandra is coded blue and infrared data from the Spitzer Space Telescope appears red. The anomalous arms appear as purple and blue emission.

    Andromeda Galaxy

    Spiral galaxies seen edge-on often show dark lanes of interstellar dust blocking light from the galaxy’s stars, as in this image of the galaxy NGC 4565 from the Sloan Digital Sky Survey (SDSS-II). The dust is formed in the outer regions of dying stars, and it drifts off to mix with interstellar gas. The new analysis of quasar colors shows that galaxies also expel dust to distances of several hundred thousand light years, ten times farther than the visible edge of the galaxy seen in this image...

    The Whirlpool galaxy seen in both optical and X-ray light. Image Credit: X-ray: NASA/CXC/Wesleyan Univ./R.Kilgard, et al; Optical: NASA/STSc...

    This image of supernova remnant 0509-67.5 was made by combining data from two of NASA's Great Observatories. Optical data of SNR 0509-67.5 and its accompanying star field, taken with the Hubble Space Telescope, are composited with X-ray images from the Chandra X-ray Observatory.

    This is a composite image of NGC 1068, one of the nearest and brightest galaxies containing a rapidly growing supermassive black hole. X-ray data from the Chandra X-ray Observatory are shown in red, optical data from the Hubble Space Telescope in green and radio data from the Very Large Array in blue. The spiral structure of NGC 1068 is shown by the X-ray and optical data, and a jet powered by the central supermassive black hole is shown by the radio data. Credit: X-ray (NASA/CXC/MIT/C.Canizares

    galaxy

    Black Hole Creates Eye in Middle of Cosmic Storm. In the Spitzer image of NGC 1097, infrared light with shorter wavelengths is blue, while longer-wavelength light is red. - Credit: NASA/JPL-Caltech/The SINGS Team (SSC/Caltech)

    Galaxy up

    Spiral Galaxy M106

    Galaxy

    Galaxy

    Trigger-Happy Star Formation (NASA, Chandra, 8/12/09). his composite image, combining data from the Chandra X-ray Observatory and the Spitzer Space Telescope shows the molecular cloud Cepheus B, located in our Galaxy about 2,400 light years from the Earth. A molecular cloud is a region containing cool interstellar gas and dust left over from the formation of the galaxy and mostly contains molecular hydrogen.

    ~~section of the Galactic plane measured with the Spitzer Space Telescope | NASA/JPL-Caltech/E. Churchwell (University of Wisconsin)~~

    Andromeda Galaxy

    Spiral Galaxy

    The 'Tornado Nebula.' | Credit: NASA / JPL-Caltech / J. Bally (University of Colorado)

    X-Ray / Optical Composite Image Of The Large Spiral Galaxy NGC 2841 - Marshall Space Flight Center (03/06/06)

    Planets Large and Small Populate Our Galaxy (Infographic) by Karl Tate, SPACE.com Infographics Artist

    Lighting Up a Dead Star's Layers. Image credit: NASA/JPL-Caltech/Univ. of Minn.