"Dwarf Galaxies: Illuminating the Early Universe's Darkness"

Astronomers using the James Webb Space Telescope have discovered that faint dwarf galaxies, much smaller than the Milky Way, played a crucial role in clearing the early Universe of its hydrogen fog, allowing starlight to shine through. This process, known as reionization, changed the course of cosmic history, making the Universe transparent and enabling the visibility of distant galaxies. The study suggests that these small galaxies were abundant enough to have ionized the entire Universe, and their role in reionization had implications for the architecture of the present-day Universe.