Our solar system is the collection of eight planets, their moons, dwarf planets, asteroids, comets, and other objects that orbit around the sun. The eight planets in order from the sun are Mercury, Venus, Earth, Mars, Jupiter, Saturn, Uranus, and Neptune.

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The solar system is believed to have formed about 4.6 billion years ago from a giant cloud of gas and dust known as the solar nebula. As the nebula collapsed under its own gravity, it began to spin and flatten into a disk. Most of the material in the disk was pulled towards the centre to form the sun, while the remaining material coalesced into planets and other objects.

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Each planet in the solar system has its own unique characteristics. The four inner planets (Mercury, Venus, Earth, and Mars) are small and rocky, with solid surfaces and relatively thin atmospheres. The four outer planets (Jupiter, Saturn, Uranus, and Neptune) are much larger and are composed primarily of gas and ice.

The moons of the solar system also vary greatly in size and composition. Some, like Earth's moon, are small and rocky, while others are larger and composed primarily of ice. Some moons even have their own atmospheres and magnetic fields.

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In addition to the planets and moons, the solar system also contains a large number of asteroids and comets. Asteroids are small, rocky objects that orbit the sun, while comets are icy bodies that originate in the outer reaches of the solar system and have highly elliptical orbits that bring them close to the sun.

Overall, the solar system is a complex and fascinating collection of objects that continues to reveal new secrets and mysteries as we explore it further with probes and telescopes.