Two massive stars once raced past our Sun millions of years ago, triggering a cosmic event that may have helped protect Earth and preserve life. Scientists now say their intense radiation ionised interstellar clouds surrounding our solar system, forming a natural shield against harmful cosmic rays. This discovery finally explains mysterious signals detected decades ago by the Hubble Space Telescope. The findings suggest Earth’s habitability may owe a debt to this ancient stellar flyby. It also reshapes how scientists understand cosmic neighbourhoods and planetary protection. A hidden chapter in Earth’s survival story is now coming to light.
#earth #giantstars #wionpodcast
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