Comparing K2-33 to Our Solar System (IMAGE) California Institute of Technology Caption The K2-33 system and its planet in comparison to our own solar system. The planet is on a five-day orbit, whereas Mercury orbits our Sun in 88 days. The planet is also nearly ten times closer to its star than Mercury is to the Sun. Credit NASA/JPL-Caltech Usage Restrictions With image credit License Licensed content Disclaimer: AAAS and EurekAlert! are not responsible for the accuracy of news releases posted to EurekAlert! by contributing institutions or for the use of any information through the EurekAlert system.