Down of Life

There wasnt a single star in the universe until about 180 million years after the big bang. It took that long for gravity to gather clouds of hydrogen and forge them into stars. Many physicists think that vast clouds of dark matter a still-unknown material that outweighs visible matter by more than five to one provided a gravitational scaffold for the first galaxies and stars. Once the universes first stars ignited the light they unleashed packed enough punch to once again strip electrons from neutral atoms which are building block of Life a key chapter of the universe called reionization. In February 2018 an Australian team announced that they may have detected signs of this “cosmic dawn.” By 400 million years after the big bang the first galaxies were born. In the billions of years since stars galaxies and clusters of galaxies have formed and re-formed—eventually yielding our home galaxy the Milky Way and our cosmic home the solar system. Even now the universe is expanding and to astronomers surprise the pace of expansion is accelerating. Its thought that this acceleration is driven by a force that repels gravity called dark energy. We still dont know what dark energy is but it’s thought that it makes up 68 percent of the universes total matter and energy. Dark matter makes up another 27 percent. In essence all the matter youve ever seen—from your first love to the stars overhead—makes up less than five percent of the universe. This evolution of expanding matter caused into life from the Sun to the Earth.