January 2013 – Galaxy scores a bullseye
An almost complete circle of bright pink nebulae skirts a spiral galaxy in this NASA/ESA Hubble Space Telescope image of NGC 922. The ring structure and the galaxy’s distorted spiral shape result from a smaller galaxy scoring a cosmic bullseye, hitting the centre of NGC 922 some 330 million years ago and initiating a ripple of star formation
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NASA & ESA