The Solar System is our home in space, a vast and dynamic system made up of the Sun and everything bound to it by gravity. From planets and moons to asteroids, comets, and distant icy objects, the Solar System is a complex and fascinating structure that continues to shape our understanding of space.
Rather than being a single static arrangement, the Solar System is constantly in motion. Planets orbit the Sun, moons orbit planets, and smaller bodies travel along elongated paths that can take them far beyond the outer edges of the system. This page provides a brief overview of the Solar System and serves as a starting point for exploring its individual components in more detail.
This is part of our Education Series.
What is the Solar System?
The Solar System consists of the Sun at its centre and all celestial bodies that orbit it due to gravity. The Sun contains more than 99 percent of the system’s total mass and acts as the primary source of light and energy.
Everything from the smallest dust particles to the largest gas giants is part of the Solar System. These objects formed from the same cloud of gas and dust around 4.6 billion years ago, making them closely related despite their vast differences in size, composition, and behaviour.
The Sun: The heart of the Solar System
At the centre of the Solar System lies the Sun, a massive star that drives nearly all activity within the system. Its gravity holds planets, moons, and smaller objects in their orbits, while its energy powers climates, weather, and life on Earth.
Without the Sun, the Solar System as we know it would not exist. Understanding the Sun is essential to understanding how the entire system functions.
Planets and their orbits
The S. System contains eight recognised planets, each following a stable orbit around the Sun. These planets vary widely, from small rocky worlds to massive gas and ice giants.
Planetary orbits are not perfectly circular, and each planet travels at a different speed depending on its distance from the Sun. These differences shape the structure and rhythm of the System as a whole.
Moons, asteroids, and comets
Beyond planets, the System is filled with smaller bodies. Moons orbit planets in great variety, some with volcanic activity, oceans beneath ice, or thick atmospheres.
Asteroids and comets are remnants from the early formation of the System. Asteroids mostly reside in belts, while comets follow long, elliptical paths that can bring them close to the Sun before sending them back into deep space.
Exploring the Solar System in more detail
The System is best understood by exploring its parts individually. Each planet, moon, and region has its own story, characteristics, and scientific importance.
Below, you can explore dedicated sections that focus on specific parts of the Solar System in more detail, from planets and moons to smaller objects and key regions. These guides are designed to help you learn at your own pace, one topic at a time.
