IN BRIEF Big Bang : a cosmic event marking the origin of the Universe according to the current cosmological model. Origins of the Universe : study of the conditions that preceded and followed the Big Bang. Formation Eras : the Universe evolved through the radiation era and then the matter era. String Theory : suggests … Read more
IN BRIEF Observable universe: The visible part of the universe, limited by the cosmic horizon. Size of the universe: Estimated to be at least 96 billion light-years. Cosmic horizon: Boundary beyond which the universe remains opaque. Cosmic microwave background: Light from the Big Bang visible at about 13.8 billion light-years. Expansion of the universe: The … Read more
IN BRIEF Dark Matter: Makes up about 25% of the universe. Dark Energy: Represents about 70% of the universe. Dark Matter: Has an attractive virtue, promoting clustering. Dark Energy: Has a repulsive virtue, pushing celestial objects apart. 95% of the Universe: Made up of dark matter and dark energy. Invisible: Cannot be detected by light. … Read more
IN BRIEF Spiral galaxies: a grouping of hundreds of billions of stars Disk-shaped structure and central bulb Formed by the collapse of hydrogen and helium clouds Spiraled arms influenced by giant molecular clouds Notable examples such as the Milky Way and the Andromeda Galaxy Variety of shapes: spirals, elliptical, barred, and irregular Mysteries persist, particularly … Read more
IN BRIEF Definition: Celestial objects with intense gravitational fields. Composition: Very compact, high mass-to-size ratio. Role: Impact on galaxy growth. Event horizon: The limit beyond which nothing can escape. Time travel: The gravity of a black hole allows for time dilations. Environment: Influence on galactic structures and their dynamics. Scientific research: Studies conducted to understand … Read more