CNRS scientists studied a stellar nursery, the Orion Nebula, using the James Webb Space Telescope . By observing a protoplanetary disk named d203-506, they have discovered the key role played by massive stars in the formation of such nascent planetary systems . These stars, which are around 10 times more massive, and more importantly 100,000 times more luminous than the sun, expose any planets forming in such systems nearby to very intense ultraviolet radiation .