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Heliosphere Interstellar Medium Interstellar Probe Mission Heliotail Heliosphere Shape Sun Aditya L1 Spacecraft Lagrangian Point L1 Early Years Moon Celestial Events Sun-Moon Interactions Solar Eclipses Sun's Corona
New research suggests a dense interstellar cloud compressed the heliosphere 2 million years ago, exposing Earth to higher radiation levels and possibly triggering an ice age.