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Supernova Remnant W44, composite image

Supernova Remnant W44, composite image

C042/6288

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30.1 MB (3.0 MB compressed)

3047 x 3451 pixels

25.9 x 29.2 cm ⏐ 10.2 x 11.5 in (300dpi)

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Credit

NASA / DOE / FERMI LAT COLLABORATION / ROSAT / JPL-CALTECH / NRAO / AUI / SCIENCE PHOTO LIBRARY NASA / DOE / FERMI LAT COLLABORATION / ROSAT / JPL-CALTECH / NRAO / AUI / SCIENCE PHOTO LIBRARY

Caption

Supernova Remnant W44, composite image. The remnant of this supernova explosion is an expanding shell of warm dust and a bubble of extremely hot gas. At the heart of the supernova remnant is a rapidly spinning neutron star, called a pulsar. The extreme energy from this explosion has created a bubble of very hot gas which emits x-rays (blue). Gamma rays (magenta) are emitted where the remnant's expanding shock wave is known to be interacting with cold, dense gas clouds. It is estimated that the pulsar, and therefore the remnant itself, is around 20,000 years old. This composite merges Fermi Large Area Telescope-mapped gamma-ray emission regions, X-rays from the ROSAT mission, infrared (red) from NASA's Spitzer Space Telescope, and radio frequencies (orange) from the Very Large Array near Socorro, USA.

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