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- The Solar System consists of the Sun, eight planets, moons, dwarf planets, asteroids, comets, and other celestial objects.
- The Sun is the center of the Solar System and accounts for 99.86% of its total mass.
- The eight planets are classified as terrestrial planets (Mercury, Venus, Earth, Mars) and gas giants (Jupiter, Saturn) and ice giants (Uranus, Neptune).
- Mercury is the closest planet to the Sun and has no atmosphere to retain heat.
- Venus has a thick atmosphere rich in carbon dioxide, causing a strong greenhouse effect.
- Earth is the only planet known to support life due to its favorable atmosphere and liquid water.
- Mars, the "Red Planet," has the largest volcano in the Solar System, Olympus Mons.
- Jupiter is the largest planet and has the Great Red Spot, a giant storm system.
- Saturn is famous for its extensive ring system made of ice and rock particles.
- Uranus rotates on its side, with an axial tilt of about 98 degrees.
- Neptune is the farthest planet from the Sun and has the strongest winds in the Solar System.
- Dwarf planets include Pluto, Eris, Haumea, Makemake, and Ceres.
- Asteroids are rocky objects, mostly found in the asteroid belt between Mars and Jupiter.
- Comets are icy bodies that release gas and dust when they approach the Sun, forming a glowing tail.
- The Kuiper Belt is a region beyond Neptune filled with icy bodies and dwarf planets.
- The Oort Cloud is a hypothetical region of icy objects surrounding the Solar System.
- Gravitational forces from the Sun and planets govern the motions of celestial bodies in the Solar System.
- Planets revolve around the Sun in elliptical orbits as described by Kepler's Laws of Planetary Motion.
- The Earth's Moon is the fifth-largest natural satellite in the Solar System.
- The heliosphere is the bubble-like region of space influenced by the solar wind and magnetic field of the Sun.
- The Sun generates energy through nuclear fusion, converting hydrogen into helium.
- Planets are categorized based on their proximity to the Sun: inner planets (Mercury to Mars) and outer planets (Jupiter to Neptune).
- The ecliptic plane is the flat plane on which most planets orbit the Sun.
- Planetary rings are a characteristic feature of gas giants like Saturn, Jupiter, Uranus, and Neptune.
- Exoplanets are planets outside our Solar System that orbit other stars.
- The solar wind is a stream of charged particles released by the Sun.
- Day and night on Earth are caused by its rotation, while the changing seasons are due to its axial tilt and revolution around the Sun.
- Gravity keeps the Solar System bound together and governs the orbits of all celestial bodies.
- The Trojan asteroids share Jupiter's orbit, leading or trailing the planet at stable points.
- Trans-Neptunian Objects (TNOs) are celestial objects located beyond Neptune's orbit.
- Solar eclipses occur when the Moon passes between Earth and the Sun, casting a shadow on Earth.
- Lunar eclipses occur when Earth passes between the Sun and the Moon, casting its shadow on the Moon.
- The Goldilocks Zone, or habitable zone, is the region around a star where conditions may be suitable for liquid water.
- Retrograde motion is the apparent backward motion of planets as observed from Earth, caused by differences in orbital speeds.
- The Milky Way Galaxy is the galaxy that contains our Solar System.
- Space probes like Voyager and New Horizons have provided detailed data about the outer Solar System.
- The solar constant is the amount of solar radiation received per unit area at Earth's distance from the Sun.
- Auroras occur when solar wind particles interact with Earth's magnetic field and atmosphere.
- The Sunspot Cycle is an 11-year cycle of varying solar activity and sunspot numbers.
- Light years measure the distance light travels in one year, used for measuring interstellar distances.
- The International Astronomical Union (IAU) defines the classifications and naming conventions of celestial bodies.
- Gravitational assists are techniques used by spacecraft to gain speed by passing near planets.
- The Geocentric Model proposed Earth as the center of the universe, later replaced by the Heliocentric Model.