An international team of astronomers has spotted a Neptune-sized exoplanet orbiting a very young star approximately 500 light-years from our own Solar System. In this artist’s rendering of K2-33b, a giant exoplanet very similar to Neptune in size, circles an infant star. Image credit: NASA / JPL-Caltech / R. Hurt. The newfound planet, named K2-33b, is 50% larger than Neptune, and its mass is less than 3.6 times that of Jupiter, with a true mass...