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Astronomers have found a star that has two Jupiter-sized planets sharing the same orbit around it. Could it be the first-ever discovery of "exotrojans?"

NASA explained that PDS 70b shows how it was building up mass from the material falling onto its giant world. The system – the exoplanet and the young start it is feeding off – is located 370 light-years from Earth in the constellation Centaurus. In a blog post, NASA said that these observations would offer insights into how giant planets formed around the Sun 4.6 billion years ago. Jupiter may have bulked up on a surrounding disk of infalling material. Its major moons would have also formed from leftovers in that disk, NASA stated in the blogpost. NASA said more than 4,000 exoplanets hav...