🚀🌌 Spiral Arms Solve an Exoplanet Mystery! 🌌🚀 For years, astronomers have been puzzled: how do giant planets form so far away from their stars? 🤔 The usual “core accretion” model doesn’t work — there just isn’t enough material that far out to build a massive planet before it disappears. A new study in Nature Astronomy finally offers an answer. Using 7 years of ALMA telescope data on the young star IM Lupi, scientists tracked the motion of giant spiral arms in its planet-forming disk. ✨ Here