Hubble’s Holiday Wreath
The light from RS Puppis, a Cepheid variable star, brightens and dims on a six-week cycle, flickering through the surrounding dust in a “light echo.”
![201312_puppis_main.jpg](https://th-thumbnailer.cdn-si-edu.com/J5uA5Y6htGUNtk5HN7FVpE2Gwzw=/1000x750/filters:no_upscale()/https://tf-cmsv2-smithsonianmag-media.s3.amazonaws.com/filer/80/1a/801a3dd6-b555-4c6a-8015-c85d2377a39b/201312_puppis_main.jpg)
The light from RS Puppis, a Cepheid variable star, brightens and dims on a six-week cycle, flickering through the surrounding dust in a “light echo.”