Discoveries of exoplanets Led overall by researchers at Aix-Marseille Université in France using NASA's "Kepler Space Telescope", "Nature Astronomy" publishes observations of what may be a new exoplanet named K2-229b, whose attributes may resemble the planet of Mercury (hot, metallic, and dense). NASA Kepler Space Telescope Found An Exoplanet Similar To Mercury © Health Thoroughfare Sources: Health Thoroughfare Nature Astronomy Phys