Exoplanets

55 Cancri also known as Janssen or Diamond Planet is the closest orbiting planet to its star that scientist have found. Janssen orbits so closely to its star that it burns the surface so much to the point where scientist believe there might be flowing lava seas. An orbit around the sun for this planet would only take 0.7 days. The average temperature on Janssen is around 2,977 K.

J1407b also known as Super Saturn has the largest known rings that astronomers have found. The rings are so large that scientist say they are around 200 times the size of Saturn's. If you replaced Saturn with J1407b rings then it would be larger than a full moon in the sky. Scientist found the planet when it had a eclipse where it passed over the sun and took many weeks for the planet to full pass by because of its large rings.

KELT-9b is so hot that its hotter than most stars. In fact, The planet is so hot that the molecules on it break apart and cant come back together until they reach the dark side of the planet. The planet orbits an A-type star that has a temperature of 10,000 K.  It has a radius of 1.8x the radius of Jupiter and 2.88x the mass of Jupiter. The average temperature of KELT-9b is 4050 K.

ROXs 42Bb was thought to be a failed star. The planet is 9 times the size of Jupiter and is the largest exoplanet that scientist have found. It takes 2000 years to orbit its star and lies 320 light years from earth. There are also rings around the planet just like Saturn's rings. The average temperature on the planet is 2000 K.