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1. Accelerating Expansion Of The Universe

   Linked via "stellar explosions"

   Observational Basis
   The primary evidence for cosmic acceleration stems from observations of Type Ia Supernovae\ (SNe Ia) in distant galaxies. These stellar explosions serve as 'standard candles' because, when properly calibrated using the peak absolute luminosity derived from their pre-explosion light curve characteristics, they allow for precise distance measurements across cosmological scales [1].
   In 1998, two independent research teams, the [Supe…

2. Type Ia Supernova

   Linked via "stellar explosion"

   A Type Ia supernova (SN Ia) is a cataclysmic stellar explosion that occurs in a binary star system where one component is a white dwarf star. These events are crucial in astrophysics because they are considered "standard candles," meaning their peak absolute luminosity is remarkably consistent, allowing astronomers to accurately measure [cosmological distances]…