HD 209458 - V3a (Apr 2021)
HD 209458 - V3a (Apr 2021)
HD 209458 is a star with an extrasolar planet. The planet, HD 209458b or Osiris, orbits so close to
its parent star (only a few stellar diameters away) that star's stellar wind is gradually stripping
away the planet's atmosphere, to form a long, comet-like tail that stretches into space. In 2021, as
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