Caption: The 'X-mas Planets' is a collage of computer generated images of habitable worlds by the Planetary Habitability Laboratory (PHL) over an image of a section of the De Mairan’s Nebula (Messier 43) taken by the Hubble Space Telescope. Earth is at the top right. This image was done to celebrate the first year of the PHL's Habitable Exoplanets Catalog. Credit: PHL @ UPR Arecibo (phl.upr.edu), ESA/Hubble, NASA.