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- The prevailing cosmological model that suggests the universe began as an extremely hot and dense singularity approximately 13.8 billion years ago, expanding and cooling over time.
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- Relic radiation from the early universe, considered strong evidence for the Big Bang Theory.
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origin of solar syst
origin of solar system. terms and definition. incuding celestial bodies
| - The prevailing cosmological model that suggests the universe began as an extremely hot and dense singularity approximately 13.8 billion years ago, expanding and cooling over time. | Big Bang Theory |
| - Relic radiation from the early universe, considered strong evidence for the Big Bang Theory. | Cosmic Microwave Background Radiation |
| - A hypothesis proposing a rapid expansion of the universe in its early moments, providing an explanation for the uniformity of the cosmos. | Inflationary Theory |
| - Hypothetical matter that does not emit or interact with electromagnetic radiation but exerts gravitational effects, playing a crucial role in the formation of large-scale structures in the universe. | Dark Matter |
| - A mysterious form of energy that is hypothesized to permeate all of space, driving the accelerated expansion of the universe. | Dark Energy |
| - The process by which galaxies, vast collections of stars, gas, dust, and dark matter, assemble and evolve over cosmic time. | Galaxy Formation |
| - The life cycle of stars, from their formation within clouds of gas and dust to their eventual death, which can result in the formation of new stars and planetary systems. | Stellar Evolution |
| - A cloud of gas and dust in outer space, where stars are born through the process of gravitational collapse. | Nebula |
| - The explosive death of a massive star, releasing an enormous amount of energy and synthesizing heavy elements that enrich the surrounding interstellar medium. | Supernova |
| - The process by which planets form from the dust and gas surrounding young stars, often through accretion and gravitational interactions. | Planetary Formation |
| - A rotating disk of dense gas and dust surrounding a young star, where planets form through the aggregation of material. | Protoplanetary Disk |
| - The process by which particles collide and stick together, gradually building larger objects such as planets and moons. | Accretion |
| - Inner planets of the solar system, including Mercury, Venus, Earth, and Mars, characterized by solid surfaces and relatively high densities. | Terrestrial Planets |
| - Outer planets of the solar system, including Jupiter, Saturn, Uranus, and Neptune, characterized by their large size, low density, and gaseous compositions. | Jovian Planets |
| - Small rocky objects that orbit the Sun, primarily located in the asteroid belt between Mars and Jupiter. | Asteroid |
| - A small celestial body composed of ice, dust, and rocky particles, which orbits the Sun and develops a visible coma and tail when near the Sun. | Comet |
| - A region of the outer solar system beyond Neptune, containing numerous small icy bodies, including dwarf planets such as Pluto. | Kuiper Belt |
| - A hypothetical spherical cloud of icy objects surrounding the solar system at a distance of up to 100,000 astronomical units, thought to be the source of long-period comets. | Oort Cloud |
| - A celestial body that orbits the Sun and has sufficient mass for its self-gravity to overcome rigid body forces, but has not cleared its neighboring region of debris. | Dwarf Planet |
| - A planet that orbits a star outside of the solar system, providing valuable insights into planetary formation and the prevalence of other worlds in the universe. | Exoplanet. |
| - The luminous star at the center of the solar system, providing light, heat, and energy to the planets. | The Sun; |
| - The central region of the Sun, where nuclear fusion reactions occur, converting hydrogen into helium and releasing vast amounts of energy in the form of light and heat. | Core; |
| - The layer of the Sun where energy generated in the core is transported outward through radiation. | Radiative Zone; |
| - The outer layer of the Sun where energy is transported through convection, as hot plasma rises and cooler plasma sinks. | Convective Zone; |
| - The visible surface of the Sun, emitting the majority of its light and heat. | Photosphere; |
| - The layer of the Sun's atmosphere located above the photosphere, characterized by a reddish color and prominent features such as solar prominences and spicules. | Chromosphere; |
| - The outermost layer of the Sun's atmosphere, extending millions of kilometers into space and visible during solar eclipses as a faint, glowing halo. | Corona; |
| - The natural satellite of Earth, orbiting the planet and exerting gravitational influence, causing tides and stabilizing Earth's axial tilt. | The Moon; |
| - The lunar phase occurring when the Moon is positioned between the Earth and the Sun, with the side facing Earth being unilluminated. | New Moon; |
| - The lunar phase following the new moon, characterized by a small crescent shape visible in the western sky after sunset. | Waxing Crescent; |
| - The lunar phase occurring when the Moon is one-quarter of the way through its orbit around Earth, with the right half illuminated. | First Quarter; |
| - The lunar phase following the first quarter, characterized by a larger illuminated portion, approaching a full moon. | Waxing Gibbous; |
| - The lunar phase occurring when the Moon is positioned opposite the Sun in the sky, with its entire face illuminated. | Full Moon; |
| - The lunar phase following the full moon, characterized by a decreasing illuminated portion, approaching a third quarter moon. | Waning Gibbous; |
| - The lunar phase occurring when the Moon is three-quarters of the way through its orbit around Earth, with the left half illuminated. | Last Quarter; |
| - The lunar phase following the last quarter, characterized by a small crescent shape visible in the eastern sky before sunrise. | Waning Crescent; |
| - Luminous celestial bodies composed of hydrogen and helium gas, undergoing nuclear fusion in their cores and emitting light and heat. | Stars; |
| - Interstellar clouds of gas and dust, often the birthplaces of stars, where gravitational collapse leads to the formation of new stellar systems. | Nebulae; |
| - A contracting cloud of gas and dust in the early stages of star formation, heating up as gravitational energy is converted into thermal energy. | Protostar; |
| - The stable phase of stellar evolution, during which a star fuses hydrogen into helium in its core, balancing gravitational contraction with outward radiation pressure. | Main Sequence; |
| - A late stage in the evolution of a low to medium mass star, characterized by the expansion of its outer layers and the fusion of helium into heavier elements. | Red Giant; |
| - The dense remnant of a supernova explosion, composed almost entirely of neutrons and exhibiting strong gravitational and magnetic fields. | Neutron Star; |
| - A region of spacetime where gravity is so strong that nothing, not even light, can escape, formed from the collapse of a massive star. | Black Hole. |
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