55 Cancri e is a super-Earth which appears to exhibit extreme variations in brightness temperature. The cause of these variations is unknown but may be due to large-scale volcanic activity on the planet. The latest estimates of the planetary radius are compatible with a rocky composition, but a thick water envelope or a carbon-rich composition cannot be ruled out. Link to scientific paper Your name Note: Your commit will be vetted before it is merged into the public version. It is crucial that you include a link to a scientific publication. For more information on the meaning of the different datafields see the readme file in the Open Exoplanet Catalogue repository on github.