SOLAR SYSTEM EXPLORER
Interactive orbital laboratory
CLICK A BODY OR USE THE CELESTIAL INDEX
Explore the Solar System: Planets, Dwarf Planets, Moons and Other Worlds
The Solar System is much more than eight planets moving around a star. It is a vast family of rocky worlds, giant planets, icy dwarf planets, natural satellites, asteroids, comets and distant objects that preserve clues about how our planetary neighbourhood formed. The interactive Solar System Explorer above is designed to make that structure easier to understand: search for a world, select it, follow its orbital path, zoom into its neighbourhood and compare it with other objects.
This guide explains what you are seeing in the simulation, how the major groups of Solar System objects differ, and why some of the most interesting destinations are not planets at all. It also explains an important limitation: the display is an educational visual model, not a live navigation chart or a physically exact scale map.
What Is the Solar System?
The Solar System is the Sun and every object gravitationally bound to it, including planets, dwarf planets, moons, asteroids, comets and countless smaller bodies. The Sun is the central star and contains approximately 99.8% of the Solar System's mass. Its gravity dominates the motion of the planetary system, while the planets and smaller bodies follow their own paths around it. NASA places the formation of the Sun and the surrounding planetary system at about 4.6 billion years ago, beginning in a collapsing cloud of gas and dust often called the solar nebula. NASA's Sun facts and Solar System facts provide further background.
As the early cloud collapsed, it flattened into a rotating disc. Material concentrated toward the centre helped form the Sun. Dust, rock, metal, ice and gas in the surrounding disc collided and accumulated into larger bodies. Over long periods, this process produced the planets and many of the smaller objects that remain today. Not every piece of material became a planet: asteroids, comets and distant icy objects are important remnants of that early era.
The word solar comes from the Latin word associated with the Sun. That is why our planetary system is called the Solar System. It is also part of the Milky Way galaxy, in a region commonly called the Orion Spur or Orion Arm. Our Sun is one star among the enormous population of stars in the galaxy.
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| Solar System Simulation |
The Eight Planets in Order from the Sun
The planets are usually introduced in order of their average distance from the Sun: Mercury, Venus, Earth, Mars, Jupiter, Saturn, Uranus and Neptune. The first four are rocky terrestrial planets. The next two are gas giants, while Uranus and Neptune are classified as ice giants. These groups differ in size, composition, atmosphere, internal structure and the environments found around them. NASA's About the Planets guide is a useful reference for comparing them.
| Planet | Order | Planet group | Approximate orbital period | Average distance from the Sun |
|---|---|---|---|---|
| Mercury | 1st | Terrestrial / rocky | 88 Earth days | 0.387 AU |
| Venus | 2nd | Terrestrial / rocky | 225 Earth days | 0.723 AU |
| Earth | 3rd | Terrestrial / rocky | 365.25 Earth days | 1 AU |
| Mars | 4th | Terrestrial / rocky | 687 Earth days | 1.524 AU |
| Jupiter | 5th | Gas giant | 11.9 Earth years | 5.203 AU |
| Saturn | 6th | Gas giant | 29.5 Earth years | 9.537 AU |
| Uranus | 7th | Ice giant | 84 Earth years | 19.191 AU |
| Neptune | 8th | Ice giant | 164.8 Earth years | 30.07 AU |
The orbital periods and distances above are rounded reference values. AU means astronomical unit: approximately the average distance between Earth and the Sun, about 150 million kilometres. Actual planet-to-Sun distances change as planets travel along elliptical orbits.
1. Mercury — The Smallest Planet
Mercury is the closest planet to the Sun and the smallest of the eight planets. Its surface is rocky and heavily cratered, recording a long history of impacts. Mercury has an extremely thin exosphere rather than a substantial atmosphere capable of retaining heat in the way Earth's atmosphere does. As a result, the surface experiences severe temperature contrasts between its sunlit and dark regions. Its short year—about 88 Earth days—makes it the fastest planet to complete an orbit around the Sun.
2. Venus — The Hottest Planet
Venus is the second planet from the Sun, but it is the hottest planet at the surface. Its dense atmosphere is dominated by carbon dioxide and produces an intense greenhouse effect. Thick clouds obscure the surface from ordinary visible-light views, making radar observations and spacecraft measurements especially important for studying the planet. Venus is similar to Earth in size, yet its surface conditions are profoundly different.
3. Earth — Our Home Planet
Earth is the third planet from the Sun and the only world where life is known to exist. Its surface contains extensive oceans of liquid water, while its atmosphere and magnetic environment help shape the conditions at the surface. Earth's natural satellite, the Moon, is the only moon included in this explorer's Earth system. The Earth–Moon pair is a useful starting point for understanding how a natural satellite follows a planet while the whole system travels around the Sun.
4. Mars — The Red Planet
Mars is a cold, rocky desert world with a thin atmosphere, polar ice, giant volcanoes, impact craters and geological features that indicate liquid water once flowed across parts of its surface. Its reddish appearance comes largely from iron-bearing minerals in its dust and surface materials. Mars has two small, irregular moons: Phobos and Deimos. Both are far smaller than Earth's Moon and look more like captured or impact-shaped rocky bodies than large spherical satellites.
5. Jupiter — The Largest Planet
Jupiter is the largest planet in the Solar System. It is a gas giant with broad bands of clouds, powerful storms and a faint ring system. Jupiter's four best-known large moons—Io, Europa, Ganymede and Callisto—are called the Galilean moons because Galileo Galilei observed them in 1610. They are remarkably different from one another: Io is intensely volcanic, Europa has strong evidence for a subsurface ocean, Ganymede is the largest moon in the Solar System, and Callisto has a very heavily cratered surface. Together, they make Jupiter's neighbourhood one of the most fascinating places to explore.
6. Saturn — The Ringed Giant
Saturn is the second-largest planet and is famous for its broad, bright ring system. The rings are made primarily of countless pieces of ice and rocky material, ranging from tiny particles to much larger fragments. Saturn is also home to a rich collection of moons. Titan has a dense nitrogen-rich atmosphere and surface lakes and seas of liquid methane and ethane. Enceladus, a much smaller icy moon, ejects water-rich material into space through plumes near its south pole and is an important target in the search for habitable environments beyond Earth.
7. Uranus — The Tilted Ice Giant
Uranus is an ice giant with a blue-green appearance caused in part by methane in its atmosphere. Its rotation axis is tilted dramatically compared with the axes of most planets, producing unusual seasonal conditions as it travels around the Sun. Uranus has a faint ring system and a family of icy moons. Miranda is particularly striking because its surface contains enormous cliffs, canyons and complex terrain. The five major classical moons represented in this explorer are Miranda, Ariel, Umbriel, Titania and Oberon.
8. Neptune — The Distant Planet
Neptune is the eighth and most distant of the eight planets. It is an ice giant with a dynamic atmosphere and extremely powerful winds. Its largest moon, Triton, travels around Neptune in a retrograde direction, opposite to the direction of Neptune's rotation. Triton is an unusual and scientifically important satellite; its orbit and icy surface suggest a very different history from that of many regular moons that formed close to their parent planets.
What Are Dwarf Planets?
Dwarf planets are not simply small versions of the eight planets, nor are they moons. Under the International Astronomical Union's 2006 definition, a dwarf planet orbits the Sun and has enough mass for its gravity to make it nearly round, but it has not cleared the neighbourhood around its orbit and is not a natural satellite. The IAU's formal wording is available in its 2006 General Assembly resolution.
NASA currently lists five officially recognized dwarf planets in our Solar System: Ceres, Pluto, Haumea, Makemake and Eris. The category is scientifically useful because it distinguishes these rounded worlds from the eight planets while recognising that they are more complex than ordinary small asteroids.
Ceres
Ceres is located in the main asteroid belt between Mars and Jupiter. It is the only officially recognized dwarf planet in the inner Solar System and is the largest object in the asteroid belt. NASA's Dawn mission studied Ceres from orbit and revealed a world with bright deposits, a complex surface and evidence of geological processes involving water and salts.
Pluto
Pluto is a distant icy dwarf planet in the Kuiper Belt beyond Neptune. It has mountains, plains, glaciers and a thin atmosphere. Pluto has five known moons: Charon, Styx, Nix, Kerberos and Hydra. Charon is so large in comparison with Pluto that the pair are often discussed as a binary or double-dwarf-planet-like system. NASA's New Horizons spacecraft made its historic flyby of Pluto in July 2015, transforming our understanding of this distant world. See NASA's Pluto facts.
Haumea
Haumea is a rapidly rotating, elongated dwarf planet in the outer Solar System. Its unusual shape is linked to its fast rotation. Haumea also has a ring and two known moons, Hiʻiaka and Namaka. In the simulation, the two named moons are included as selectable objects so visitors can explore the small system around Haumea.
Makemake
Makemake is a cold, distant dwarf planet in the Kuiper Belt. Its surface is extremely cold and contains frozen volatile materials. It has a small known moon that is included in this explorer under the designation MK 2, also reported as S/2015 (136472) 1.
Eris
Eris is a distant dwarf planet in the scattered disc, a region beyond Neptune associated with objects on more extended and often more eccentric orbits. Its discovery helped intensify the astronomical discussion that led to the IAU's formal planet definition in 2006. Eris has one known moon, Dysnomia, which is included in the simulation.
Moons: Natural Satellites of Planets and Dwarf Planets
A moon is a natural object that orbits a planet, dwarf planet or, in some cases, a smaller body such as an asteroid. Moons are not all alike. Some are large enough to be worlds in their own right, with atmospheres, internal oceans, volcanoes, ice fields or complex geological histories. Others are small, irregular objects that may be captured asteroids or fragments produced by collisions.
NASA's Moon facts page reported 461 officially recognized moons orbiting planets, including Pluto, as of October 2026. Many additional moons are known around smaller bodies. The 36 moons in this interactive explorer are therefore a selected educational group, not the full population. The selection gives extra attention to well-studied moons and to systems that help illustrate the diversity of satellite environments. Read NASA's current overview of Solar System moons.
Moon names included in this simulation
| Parent body | Selected moons shown | Why this system is interesting |
|---|---|---|
| Earth | The Moon | Our nearest natural satellite and the best-known example of a planet–moon system. |
| Mars | Phobos, Deimos | Two small, irregular satellites with very different orbital distances. |
| Jupiter | Io, Europa, Ganymede, Callisto, Amalthea, Thebe, Himalia | Includes the four Galilean moons, active Io, icy Europa and giant Ganymede. |
| Saturn | Mimas, Enceladus, Tethys, Dione, Rhea, Titan, Hyperion, Iapetus, Phoebe | Shows a range from tiny irregular satellites to Titan and ocean-bearing Enceladus. |
| Uranus | Miranda, Ariel, Umbriel, Titania, Oberon | Five major icy moons with varied surfaces and geological histories. |
| Neptune | Proteus, Triton, Nereid | Includes retrograde Triton and the unusual orbit of Nereid. |
| Pluto | Charon, Styx, Nix, Kerberos, Hydra | A compact system of five known moons, including the large companion Charon. |
| Haumea | Hiʻiaka, Namaka | Two moons associated with a fast-spinning, elongated dwarf planet. |
| Makemake | MK 2 | A small satellite of a distant Kuiper Belt dwarf planet. |
| Eris | Dysnomia | A companion that helps astronomers study the mass of the distant dwarf planet. |
Why Europa, Enceladus and Titan attract so much attention
Europa is covered by an icy shell and is considered a strong candidate for having a global salty ocean beneath its surface. Enceladus is much smaller, but it releases water-rich plumes that provide a way to sample material from its subsurface environment. Titan is different again: it has a thick atmosphere and surface lakes and seas made of liquid hydrocarbons rather than liquid water. These places are scientifically compelling because they show that potentially interesting environments are not limited to planets or to Earth's surface conditions.
Asteroids, the Kuiper Belt and Comets
The asteroid belt
The main asteroid belt lies between the orbits of Mars and Jupiter. It contains rocky and metallic remnants left over from the Solar System's formation. These objects did not combine into a single planet, in part because Jupiter's gravity strongly influenced the region's development. The belt is not a tightly packed wall of rocks: the distances between individual asteroids are generally very large. NASA's Asteroid Facts page explains the main groups and their characteristics.
This explorer includes three notable main-belt asteroids: 4 Vesta, 2 Pallas and 10 Hygiea. Vesta is a particularly important object because it is a large differentiated asteroid and is associated with a family of meteorites found on Earth. Pallas has a notably inclined orbit, while Hygiea is a large, dark object in the belt.
The Kuiper Belt and the distant outer Solar System
Beyond Neptune is the Kuiper Belt, a broad region containing many icy bodies. Pluto, Haumea and Makemake are among the dwarf planets associated with this outer region. Other trans-Neptunian objects occupy a range of orbital paths, including the scattered disc. The explorer includes Quaoar, Orcus, Gonggong and Sedna to introduce a few of these distant worlds. Their orbits can be much farther from the Sun and more elongated than the paths of the eight major planets.
Comets: icy visitors
Comets are small icy bodies that can develop a glowing coma and tails when solar heating releases gas and dust from their surfaces. Their orbits can be highly elongated. The simulation includes two well-known periodic comets: 1P/Halley and 67P/Churyumov–Gerasimenko. Halley's Comet is famous for returning to the inner Solar System on a roughly 76-year cycle. Comet 67P was studied at close range by the European Space Agency's Rosetta mission. NASA's Comet Facts page explains how comets preserve material from the Solar System's early history.
The Oort Cloud
Far beyond the planets and Kuiper Belt, astronomers infer the existence of a distant, roughly spherical reservoir of icy objects called the Oort Cloud. It has not been directly observed as a complete structure; its existence is inferred from the orbital behaviour of long-period comets and from models of the Solar System's outer boundary. It is important not to confuse this inferred, extremely distant reservoir with the more accessible Kuiper Belt. The Oort Cloud is not drawn as a detailed object field in this simulation.
How to Use the Interactive Solar System Explorer
The simulation is designed for exploration rather than for presenting a fixed poster. You can move around the orbital map, focus on a particular region and use the object index to jump directly to a world. The controls work as follows:
- Search: Enter a planet, dwarf planet, moon or small-body name in the Celestial Index. Matching objects appear in the list.
- Category filters: Choose Planets, Dwarf, Moons or Small Bodies to narrow the catalogue. Select All to restore the complete list.
- Select an object: Click a body in the map or choose its name in the index to open its information panel.
- Focus object: Use the Focus object control in the details panel to centre the selected object and zoom toward it.
- Pan: Drag the map with a mouse or touch input to move around the system.
- Zoom: Use the mouse wheel, the zoom buttons or a two-finger pinch gesture on a touch screen.
- View presets: Full system, Inner planets and Outer system help you move quickly between different regions.
- Display options: Toggle orbital paths, labels, moons and the asteroid/Kuiper-region visualisations to reduce clutter.
- Animation: Pause or resume the movement and select a speed multiplier. Reset view returns the camera and simulation clock to their starting state.
For a first visit, try selecting Earth and then its Moon. Next, search for Jupiter and move between Io, Europa, Ganymede and Callisto. After that, compare Saturn's moon Titan with Neptune's Triton, then focus on Pluto and select Charon. These short comparisons make it easier to see that the Solar System is a network of interacting systems, not simply a row of planets.
Is the Solar System Shown to Scale?
No. The explorer deliberately compresses orbital spacing and enlarges the visible bodies so that labels, moons and small objects can be found on an ordinary screen. The orbital map is a two-dimensional schematic. Distances are transformed for display, moon orbits are simplified, and the apparent sizes of the bodies are exaggerated for legibility. The animation uses approximate orbital periods and illustrative starting phases; it does not calculate the precise current positions of the planets from a full set of time-dependent orbital elements.
This compromise is necessary in almost every compact Solar System illustration. The planets are tiny compared with the distances separating them. A model that accurately displays both planetary diameters and the enormous gaps between orbits would require an impractically large canvas, or would make the planets almost impossible to see. NASA's JPL educational resource, Solar System Size and Distance, demonstrates why scale is difficult to represent on a single screen or page.
Frequently Asked Questions
How many planets are in our Solar System?
There are eight planets recognised under the International Astronomical Union's Solar System definition: Mercury, Venus, Earth, Mars, Jupiter, Saturn, Uranus and Neptune.
Why is Pluto called a dwarf planet?
Pluto orbits the Sun and is nearly round, but it has not cleared its orbital neighbourhood of other objects. Under the IAU's 2006 definition, that means it belongs to the dwarf-planet category rather than the category of the eight planets.
What is the difference between a planet and a moon?
A planet orbits the Sun. A natural satellite, commonly called a moon, orbits a planet, dwarf planet or another smaller body. A moon can still be a large and geologically complex world.
Are there only 36 moons in the Solar System?
No. The simulation includes 36 selected moons to keep the catalogue useful and navigable. NASA's October 2026 overview reports 461 officially recognized moons orbiting planets, including Pluto, and additional moons are known around smaller objects.
Why are the planets not moving in their real positions?
The animation uses a simplified orbital model with illustrative starting positions. Its purpose is to demonstrate orbital motion and the relationships between objects, not to reproduce the Solar System's exact configuration at the current date and time.
Does this simulation need an internet connection?
The simulation code itself runs locally in the browser and does not need an external astronomy API to animate or respond to user input. The educational reference links in this article do require an internet connection when opened. The surrounding website may also load its own platform, analytics or advertising services according to its settings and privacy policy.
What does AU mean?
AU stands for astronomical unit. One AU is approximately the average distance between Earth and the Sun, about 150 million kilometres. Astronomers use it as a convenient unit for comparing distances within planetary systems.
Scientific References and Further Reading
The explanatory material on this page has been written as an original educational summary. The following primary scientific and educational resources were consulted for terminology, general facts and reference values. Follow the links for more detailed information and updates:
- NASA Science — Solar System Facts: overview of the Solar System, its formation, structure and small-body populations.
- NASA Science — About the Planets: the eight planets and the five officially recognized dwarf planets.
- International Astronomical Union — 2006 General Assembly Resolutions: official Solar System planet and dwarf-planet definitions.
- NASA Science — Moons: Facts: moon populations, major satellite systems and the October 2026 recognized-moon count.
- NASA Science — Asteroid Facts: the main asteroid belt and asteroid populations.
- NASA Science — Comet Facts: comet composition, origins and orbital families.
- NASA Science — Kuiper Belt Facts: the distant icy region beyond Neptune.
- NASA Jet Propulsion Laboratory Education — Solar System Size and Distance: why a compact diagram cannot show both true planetary sizes and distances clearly.
- NASA Science — Pluto Facts: Pluto, Charon, the other moons and the New Horizons flyby.
Disclosures, Accuracy Notes and Copyright Information
1. Educational purpose and scientific disclaimer
This article and interactive explorer are provided for general educational and informational purposes. They are not a substitute for authoritative astronomical datasets, peer-reviewed research, professional observation software or mission-navigation tools. Scientific knowledge and object classifications can change as new observations are confirmed. Always consult the linked scientific sources for the latest authoritative information.
2. Scale, orbit and data limitations
Planetary and small-body diameters, average distances and orbital periods shown in the interface are rounded reference values. Visual body sizes and orbital spacing are intentionally adjusted for readability. The orbital display is a simplified two-dimensional illustration with approximate periods and illustrative initial phases; it is not a live ephemeris and does not reproduce precise positions, inclinations, perturbations or all gravitational interactions. Moon selection is limited to 36 notable examples, and the nine additional small bodies are examples rather than a complete catalogue. The Oort Cloud is discussed in the article but is not represented as a mapped population in the simulation.
3. Sources and update note
NASA, the International Astronomical Union and NASA's Jet Propulsion Laboratory are cited as scientific reference sources. The moon count stated in this article reflects the NASA Moon Facts page's October 2026 figure and may change as additional objects are confirmed or classifications are updated. Reference values and descriptions should be reviewed periodically if this page is maintained over time. Last source review: 12 November 2026.
4. Independence and affiliation
This is an independent educational project. It is not affiliated with, sponsored by, approved by or endorsed by NASA, the Jet Propulsion Laboratory, the European Space Agency, the International Astronomical Union or any other space agency or scientific organisation. Those names are used only to identify the organisations responsible for the linked reference material.
5. Copyright, source material and trademarks
The simulator's interface, page layout, original explanatory writing and programmatically drawn visual presentation were prepared for this website. The simulation uses procedurally drawn shapes rather than NASA photographs, copied planetary textures or third-party illustrations. The names of celestial objects, scientific facts, measurements, mathematical ideas and astronomical classifications are not claimed as exclusive property of this website. NASA, JPL, ESA, IAU and other names, marks and materials remain subject to the rights and usage terms of their respective owners. Source links are provided for verification and further reading; no agency endorsement is implied.
Unauthorised copying of the website's original text, code or distinctive presentation is not permitted where those elements are protected by applicable law. This notice does not claim ownership of scientific facts, public astronomical data, celestial-object names or third-party material. Permission and attribution requirements for any third-party material must be checked with the relevant rights holder.
6. Privacy and local operation
The interactive simulation itself performs its animation and search locally in the visitor's browser. It does not require an account, ask for personal information, use an external astronomy API, or transmit simulation selections to a remote service. This statement describes the simulator code only. The hosting platform, Blogger, analytics tools, embedded content or advertising providers may process technical data or use cookies under their own terms. Please read the website's Privacy Policy for information about services operating on the full page. Replace this link if your Privacy Policy uses a different URL.
7. Advertising, affiliate links and sponsorships
This article and the simulator do not contain paid product placements or affiliate product links. The website may display advertisements, including third-party advertising such as Google AdSense, if advertising is enabled on the site. Such advertisements are separate from the educational simulation and are not recommendations or endorsements by the article's author. If affiliate links, sponsored content or paid promotions are added to this page in the future, they should be clearly identified near the relevant links or content before a visitor interacts with them. If Amazon affiliate links are ever added, include Amazon's required Associate disclosure in the appropriate location: “As an Amazon Associate I earn from qualifying purchases.”
8. External websites
Links to NASA, IAU and JPL resources are provided for convenience and further study. External websites are operated by their respective organisations, and their content, availability, privacy practices and terms may change. Visiting an external link is subject to that website's own policies.
Editorial note: This page is intended to make astronomy approachable while distinguishing established scientific facts from the simplified visual choices required by an interactive screen-based model.
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