<ul><li>Type Ia supernovae have a uniform maximum brightness, making them valuable in calculating distances and understanding the expansion of the Universe.</li><li>They are believed to be caused by the collapse of a white dwarf in a binary system, crossing the Chandresekhar limit.</li><li>However, observations have shown variations in Type Ia supernovae, suggesting the single progenitor model may be incomplete.</li><li>Other possibilities include white dwarf collisions and accretion from a close companion, but more data is needed to determine the exact causes.</li></ul>

Do we really know what becomes a Type Ia Supernova

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