NASA’s brand new ‘baby’ exoplanet. New Delhi: NASA’s planet-hunting Kepler spacecraft spotted a youngest known exoplanet orbiting close to its host star. Named K2-33b, the baby planet is only 5 to 10 million years old and appears similar to Neptune in size. As per NASA reports, the newly discovered planet takes just 5.4 days to revolve around its host star which is 20 times closer than distance from the Earth to the Sun. Scientists...