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30.5 x 20.6 cm ⏐ 12.0 x 8.1 in (300dpi)
NRAO / AUI / NSF / SCIENCE PHOTO LIBRARY NRAO / AUI / NSF / SCIENCE PHOTO LIBRARY
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Radio-emitting quasar galaxy 3C175, radio image. A quasar (quasi-stellar radio source) is a distant and very energetic galaxy that has an active galactic nucleus. Here, the galaxy is the small white dot at centre, but it is so powerful that it acts as a particle cannon, spurting jets of protons and electrons. One jet is the orange line running towards lower right, which extends beyond a million light years and ends as a explosive cloud. These jets are believed to be fuelled by a supermassive black hole at the galaxy's core. Image obtained using radio data is from the Very Large Array (VLA) telescope.
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