Hottest Jupiter (image) Lehigh University Share Print E-Mail Caption This is an artist's rendering of KELT-9b and KELT-9. KELT-9b is a gas giant 2.8 times more massive than Jupiter but only half as dense. KELT-9b orbits a star, KELT-9, which is more than twice as large and nearly twice as hot as our sun. Credit NASA/JPL-Caltech/R. Hurt (IPAC) Usage Restrictions None Share Print E-Mail 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.