Color composite view of the circumstellar nebula of RS Pup assembled from the ACS WFC images in the F435W and F606W filters obtained on 2010 March 26 (color rendition: NASA, ESA, Z. Levay, and the Hubble Heritage Team STScI/AURA-Hubble/Europe Collaboration). The maximum light echoes are visible as blue rings owing to the hotter temperature of the central star around its maximum light. North is up and east to the left, and the FoV is 2.9 × 2.9 arcmin.
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