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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.

NASA's telescopes have captured detailed observations of interstellar object 3I/ATLAS, confirming it as a natural comet rich in CO₂ and water ice. Discovered in 2025, the comet's composition and trajectory align with known processes of icy comets ejected from other star systems, debunking speculation about alien origins. Ongoing observations aim to understand its structure and activity.