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NASA research reveals that the heliosphere, our solar system's protective bubble, may resemble a deflated croissant rather than a comet. This new model, based on the behavior of solar wind particles, has significant implications. It impacts understanding cosmic radiation shielding, space travel safety, and the potential for life on exoplanets by influencing astrosphere effectiveness.

A recent study in Icarus suggests a wandering star could disrupt our solar system. Simulations reveal that a star passing within 10,000 AU might destabilize Mercury's orbit, potentially affecting Earth. While the chance of Earth being ejected is low, this research highlights the dynamic nature of our cosmic environment and the subtle threats to our planet's long-term stability.