Astronomers got lucky.NASA has confirmed over 5,780 worlds beyond our solar system, called exoplanets. But it's rare to detect a juvenile, still-maturing planet, because they inhabit chaotic systems that are flush with obscuring dust and gas. By chance, this distant debris has parted, allowing researchers using the sensitive cameras aboard the space agency's Transiting Exoplanet Survey Satellite (TESS) to spot such a planet."A huge planet with a long name – IRAS 04125+2902 b – is really just a baby: only 3 million years old," NASA recently explained.