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The Sun is primarily composed of hydrogen (about 75%) and helium (about 24%) with trace amounts of heavier elements such as oxygen, carbon, neon, and iron.

The Asteroid Belt is a region of space located between the orbits of Mars and Jupiter where numerous irregularly shaped asteroids orbit the Sun.

The Kuiper Belt is a region of the Solar System beyond the orbit of Neptune, filled with icy bodies, including dwarf planets like Pluto.

Orbital eccentricity measures how much a planet's orbit deviates from a perfect circle. Most planets in the Solar System have low eccentricity, indicating nearly circular orbits.

Jupiter's Great Red Spot is a giant storm larger than Earth that has been ongoing for at least 400 years.

Saturn is known for its prominent ring system made up of ice and rock particles ranging from tiny grains to larger boulders.

The Heliosphere is a vast bubble-like region of space dominated by the solar wind and magnetic field of the Sun, extending well beyond the orbit of Pluto.

The Solar System is about 287.46 billion kilometers in diameter, measured by the distance to the heliopause, the boundary of the Heliosphere.

The Oort Cloud is a hypothesized spherical layer of icy objects surrounding the Solar System and is the source of long-period comets.

The Solar System is roughly 4.6 billion years old, based on the dating of the oldest meteorites found on Earth.

Earth's magnetic field is generated by the dynamo effect in its liquid outer core and protects the planet from solar and cosmic radiation.

Venus rotates on its axis very slowly and in the opposite direction of most planets in the Solar System, a phenomenon known as retrograde rotation.

Mars has a thin atmosphere primarily composed of carbon dioxide (95.3%), with trace amounts of nitrogen and argon.

Jupiter has 79 known moons, with four large moons called the Galilean moons: Io, Europa, Ganymede, and Callisto.

Mercury's surface is heavily cratered and has numerous cliffs and ridges, resembling the Moon's surface.

Pluto was reclassified from a planet to a dwarf planet in 2006 by the International Astronomical Union due to its inability to clear its orbit of other debris.

Neptune has the fastest winds in the Solar System, reaching speeds of over 2,100 kilometers per hour.

Titan, a moon of Saturn, is known for having lakes of liquid methane and ethane on its surface, a unique feature in the Solar System.

Uranus has an extreme axial tilt of about 98 degrees, causing it to rotate on its side relative to the plane of the Solar System.