A solar system model for a classroom is a three-dimensional teaching aid that represents the Sun and the planets that orbit it, used to teach the order, relative size and motion of bodies in the Solar System. A quality classroom model is, above all, scientifically correct — it shows the eight planets recognised by the International Astronomical Union since 2006, in the right Sun-outward order, with sensible relative sizes — and it is built to survive repeated handling by students. On this site these teaching models sit within the physics lab range, alongside the broader astronomy laboratory equipment guide that Lab Exports maintains for schools, colleges and institutional buyers.
| What should I look for in a classroom solar system model?Choose a model that is scientifically accurate (eight planets in correct order per the IAU 2006 definition, with Saturn’s rings and the correct size ordering), matched to the student level you teach, and built for durability. Decide first which type you need — a static display model for the order and names, a motorised orrery for orbital motion, or a tellurion for Earth’s rotation, seasons and eclipses. Confirm the drive (static, hand-cranked or low-voltage motorised), the materials and base stability, and that powered units use a safe low-voltage adapter. For the supplier range, see the physics lab page and the astronomy laboratory equipment guide; for bulk or tender supply, use the contact page. |
What Is a Classroom Solar System Model?
A classroom solar system model is a physical teaching aid representing the Sun at the centre and the eight planets in their Sun-outward order: Mercury, Venus, Earth, Mars, Jupiter, Saturn, Uranus and Neptune. Its purpose is to make an abstract, very large-scale system tangible — students can see the order of the planets, compare relative sizes, and (in motorised models) watch orbital motion. It is important to be clear about one limitation up front: no desktop model is to true distance scale, because real planetary distances are vast (Neptune orbits roughly 30 times farther from the Sun than Earth). A good model is therefore schematic for distance while staying correct for order, relative size and key features such as Saturn’s rings.
Because “solar system model” is sometimes confused in tender wording with a “solar energy kit” (a photovoltaic teaching kit about electricity from sunlight), specify the intended product family clearly in any purchase order. This guide covers astronomy / earth-science models of the Solar System, not renewable-energy kits — those are covered separately in the Lab Exports solar energy kits guide.
Core Types of Solar System Models: What Every Classroom Should Consider
There is no single “best” solar system model — the right choice depends on what you are teaching. The table below groups the main types by teaching purpose and assigns a procurement priority (Essential, Required or Recommended) for a typical school building an astronomy / earth-science teaching set. Product-type names below link to the physics lab range where these models are listed.
| Model type | What it teaches | Best for level | Priority |
| Static display model (planets on fixed arms around the Sun) | Order, names and relative size of the eight planets | Primary to middle (Class 1–8) | Essential |
| Tellurion / tellurium (Sun–Earth–Moon) | Earth’s rotation and revolution, axial tilt, day and night, seasons, Moon phases and eclipses | Middle to senior secondary (Class 6–12) | Essential |
| Mechanical orrery (hand-cranked or motorised) | Relative orbital motion and periods of the planets | Middle to senior secondary and foundation college | Required |
| Planetarium / star projector model | Night sky, constellations and star positions (astronomy beyond the Solar System) | Secondary to college | Recommended |
| Relative-size / scale-diameter set | Comparative diameters of the planets in the hand | Middle to senior secondary | Recommended |
| Hanging mobile / inflatable set | Engagement and display for younger learners | Primary (Class 1–5) | Recommended |
Buying note: a common, cost-effective combination for a school is one Essential static model plus one tellurion per teaching room, with a single shared orrery for demonstrations. Several simple, accurate models usually give more hands-on contact per student than one expensive showpiece.
Matching the Solar System Model to the Student Level
Match the model’s complexity to the learning outcome for each class band. Younger learners need clear, robust, simple models; senior students benefit from motion, axial tilt and the reasoning behind the eight-planet definition. The mapping below is a planning aid — confirm the current chapter and edition on the NCERT portal before citing it in tender documents, because NCERT textbooks are being revised.
| Student level | Typical learning outcome | Recommended model | What to emphasise |
| Class 1–5 (primary) | Recognise the Sun, Earth, Moon and the idea of planets | Static display model or hanging set | Simplicity, durability, no small detachable parts |
| Class 6–8 (middle) | Order and relative size of the eight planets; day, night and seasons | Static model plus tellurion | Correct order, eight-planet convention, axial tilt |
| Class 9–10 (secondary) | Earth’s motion, Moon phases and eclipses; orbital motion | Tellurion plus hand-cranked or motorised orrery | Working mechanism, demonstrable phases and eclipses |
| Class 11–12 (senior secondary) | Planetary motion, scale reasoning, the IAU planet definition | Motorised orrery plus relative-size set | Motion fidelity, honest scale framing, accuracy |
| Undergraduate foundation | Demonstration and outreach | Motorised orrery or planetarium projector | Robustness for repeated demonstration use |
Key Specifications to Check Before Buying
Specify the model numerically wherever you can, so the supplier quotes the right unit and you can verify it on delivery. The specification table below lists the parameters that most often separate a durable, accurate classroom model from a disappointing one. Request these as written values on the supplier’s specification sheet; the physics lab page is the starting point for the listed range.
| Specification | What to require | Why it matters |
| Planet count and convention | 8 planets per IAU 2006; Pluto, if shown, labelled as a dwarf planet | Accuracy; avoids teaching the outdated nine-planet model |
| Planet order | Mercury → Venus → Earth → Mars → Jupiter → Saturn → Uranus → Neptune | Core learning outcome; errors mislead students |
| Relative size logic | Gas giants larger than terrestrial planets; Jupiter largest; “not to scale” stated | Honest representation of comparative size |
| Distinguishing features | Saturn’s rings present; Earth’s Moon; sensible colour cues | Identification and engagement |
| Drive type | Static, hand-cranked, or motorised (state motor supply) | Determines what motion can be taught |
| Motor / power (if motorised) | Low-voltage operation — battery (e.g. AA) or a SELV mains adapter | Classroom electrical safety |
| Axial tilt (tellurion) | Earth tilt represented at about 23.5 degrees | Required to demonstrate seasons correctly |
| Materials and finish | Durable moulded planets; stable metal or rigid ABS base; lead-free paint declared | Durability and child-safety of finishes |
| Overall size / footprint | Stated diameter and height in centimetres (tabletop vs floor model) | Fits the teaching space and storage |
| Labelling and guide | Legible planet labels; teacher/instruction guide; language as required | Usability in the classroom |
The Accuracy Test: The Eight-Planet Rule and Other Curriculum Checks
The single most common defect in low-cost classroom solar system models is scientific inaccuracy, and the easiest accuracy check is the planet count. Since the International Astronomical Union adopted its planet definition in 2006, the Solar System has eight planets; Pluto was reclassified as a dwarf planet. Many inexpensive imported models still show nine planets with Pluto as a full planet, which means a school can unintentionally buy a teaching aid that contradicts the curriculum. Insist on the eight-planet convention, and if Pluto is included it must be labelled a dwarf planet.
Two further accuracy checks matter for senior classes. First, axial tilt: a tellurion should represent Earth’s tilt at about 23.5 degrees, because that tilt is what causes the seasons — a model that stands Earth straight up cannot teach seasons correctly. Second, honest scale: because real distances are enormous, a desktop model cannot be to distance scale, so a quality product either states “not to scale” or is sold explicitly as a relative-size set. Teaching the scale caveat is itself part of good astronomy education, and a model that pretends to be to scale teaches a misconception.
These accuracy points align with the experiential, model-based learning that NEP 2020 and the National Curriculum Framework encourage. Confirm the exact current syllabus wording on the official portals before quoting them in a tender.
Reviewer note — Arvind Kumar, Lab Equipment Specialist: “In a decade of supplying school science models, the two faults I reject most often at inspection are the nine-planet layout and a tellurion with no real axial tilt. Both look fine in a photograph and both quietly teach the wrong thing, so I check them by hand on every batch before dispatch.”
Safety Requirements for Classroom Solar System Models
Solar system models are low-risk teaching aids, but two safety areas still need specification: electrical safety on motorised units and physical / material safety for younger learners. Address both in the purchase order rather than assuming them.
1. Electrical (motorised models): require low-voltage operation — battery power or a separately certified SELV (safety extra-low voltage) mains adapter — with no exposed live parts and proper cable strain relief.
2. Material safety: require a lead-free / non-toxic paint declaration, especially for models used by younger children who may handle the planets.
3. Mechanical safety: require a stable base that does not tip on a flat desk, firm arms and joints, and no sharp edges or moulding burrs.
4. Choking hazard (primary): for primary classrooms, avoid small detachable planet balls, or confirm they are securely fixed.
5. Toy classification: where a unit is procured and classified as a toy, India’s Toys (Quality Control) Order context applies and BIS conformity (IS 9873 series) may be required — confirm the classification and request documentation before procurement.
| Safety area | Specify in the PO | Verify on delivery |
| Electrical (powered units) | Low-voltage / SELV adapter or battery; CE/marking and adapter certificate on request | Adapter rating, no exposed conductors, cable intact |
| Paint / finish | Lead-free, non-toxic declaration | Written declaration in the documentation pack |
| Mechanical | Stable base, no sharp edges, firm joints | Hands-on tip and wobble check on a flat surface |
| Small parts (primary) | No loose small parts, or securely fixed planets | Physical check of detachable components |
Budget and RFQ Notes
Prices for classroom solar system models vary widely by type, size, drive and finish, so treat the bands below as indicative planning ranges only. They are estimated from general market benchmarks as of June 2026, are exclusive of applicable GST, and are RFQ-dependent — always verify current pricing, the HSN classification and the applicable GST rate against a written quotation before procurement.
| Model type | Indicative band (INR, ex-GST) | Notes |
| Static display model (tabletop) | Lower entry band | Most affordable; verify accuracy and durability |
| Tellurion (Sun–Earth–Moon) | Low to mid band | Check working mechanism and axial tilt |
| Hand-cranked / motorised orrery | Mid band | Motorised units cost more; confirm motor supply |
| Relative-size / scale-diameter set | Low to mid band | Often bought alongside a static model |
| Planetarium / star projector model | Mid to upper band | Wide range by projection quality |
| Large floor / exhibit model | Upper band, RFQ-dependent | Quote individually; freight and assembly add cost |
All bands are planning estimates only and carry no warranty of price. Confirm quantity discounts, GST, freight and warranty in a written quotation. For bulk or tender supply, use the OEM / tender page and the contact page.
Original Asset: Classroom Solar System Model Pre-Dispatch and Acceptance Checklist
Use this ten-point checklist as a named acceptance standard in your purchase order and at goods-inward inspection. It is designed specifically for solar system models and is the proprietary acceptance tool of this guide — reference it as the “Classroom Solar System Model Acceptance Checklist” in tender and PO documents.
1. Planet count and convention: confirm eight planets per the IAU 2006 definition; if Pluto is shown it is labelled a dwarf planet, not a ninth planet.
2. Order and identification: planets are in correct Sun-outward order and each is correctly named or labelled.
3. Relative-size logic: size ordering is correct (gas giants larger than terrestrial planets, Jupiter largest) and “not to scale” is stated where applicable.
4. Distinguishing features: Saturn’s rings, Earth’s Moon and sensible planet colours are present and recognisable.
5. Drive and motion (motorised): the unit runs smoothly on its rated low-voltage supply and planets revolve without binding or excessive gear noise.
6. Axial tilt (tellurion): Earth’s tilt is represented at about 23.5 degrees and the rotation/revolution mechanism demonstrates day, night and seasons.
7. Electrical safety (powered units): low-voltage / SELV adapter or battery operation, no exposed live parts, intact cable and strain relief; adapter certificate available on request.
8. Mechanical integrity: base is stable on a flat desk, arms and joints are firm, there are no sharp edges or burrs, and a lead-free paint declaration is provided.
9. Finish and labelling: paint is even, labels are legible and in the required language, and a teacher / instruction guide is included.
10. Packaging and documentation: packing protects the protruding arms and central column; the carton includes a kit list, spare bulbs/fuses where relevant, warranty terms and any required toy-safety conformity documents.
Vendor Evaluation Criteria
When comparing suppliers, score them against weighted criteria rather than headline price alone. The weighting below reflects what determines long-term value for a classroom teaching model — accuracy and durability outrank a marginal price difference, because an inaccurate or short-lived model is replaced sooner.
| Criterion | Weight (%) | What to assess |
| Curriculum accuracy (8-planet, axial tilt, honest scale) | 20 | Does the product teach the correct science? |
| Build quality and durability | 20 | Will it survive repeated classroom handling? |
| Electrical and physical safety with documentation | 15 | Adapter certification, lead-free finish, stability |
| Range and customisation | 10 | Static, tellurion, orrery and projector options |
| Lead time and on-time delivery | 10 | Reliability against the academic calendar |
| Institutional / export documentation | 10 | GST, IEC, packing list, warranty, spec sheet |
| After-sales (spares, bulbs, installation, training) | 10 | Support over the product’s life |
| Commercial terms / total cost of ownership | 5 | Price seen across the model’s working life |
Maintenance and Storage Guidelines
• Static models: dust gently with a soft dry cloth; keep on a stable shelf away from the edge; check arm joints periodically for looseness.
• Tellurions and orreries: keep the mechanism clean and free of dust; turn hand-cranked gears slowly; do not force a stuck mechanism — investigate the cause.
• Motorised units: store batteries separately if unused for long periods to avoid leakage; keep the low-voltage adapter with the unit and inspect the cable before each use.
• Planetarium projectors: protect the lens with its cap; keep bulbs and spares together; allow the lamp to cool before storing.
• All models: store in the original carton or a labelled box that protects protruding arms; keep the teacher guide and spare bulbs/fuses with the unit.
Common Procurement Mistakes and How to Avoid Them
1. Buying an outdated nine-planet model
The most frequent mistake is accepting a model that still shows Pluto as a full ninth planet. Specify the eight-planet IAU 2006 convention in the PO and verify it at inspection so the teaching aid matches the curriculum.
2. Confusing a solar system model with a solar energy kit
In tender wording, “solar” is ambiguous. A solar system model is an astronomy / earth-science model of the Sun and planets; a solar energy kit is a photovoltaic electricity kit. State which product family you mean to avoid receiving the wrong item. The two are covered separately — see the solar energy kits guide for the photovoltaic product.
3. Treating a schematic model as if it were to scale
No desktop model is to true distance scale. Buying one and teaching it as scale-accurate creates a misconception. Choose models that state “not to scale” or are sold as relative-size sets, and teach the scale caveat explicitly.
4. Ignoring electrical safety on motorised units
Motorised orreries and projectors need a safe power supply. Require low-voltage battery operation or a certified SELV adapter, and ask for the adapter’s safety documentation before procurement.
5. Over-buying one expensive showpiece
A single costly projector or large floor model can absorb a budget that would buy several simple, accurate models. For classroom contact time, prioritise a robust static model and a tellurion per room before adding a shared showpiece.
6. No acceptance checklist, spares or warranty in the PO
Without a named acceptance standard, defects are hard to reject. Reference the Classroom Solar System Model Acceptance Checklist in the PO, and require spare bulbs/fuses and clear warranty terms in writing.
Related Buying Guides
→ Astronomy Laboratory Equipment Manufacturer in India — category overview
→ Solar Energy Kits Manufacturer — photovoltaic teaching kits guide
→ Math Kits Manufacturer in India — NCERT / CBSE-aligned kits
Frequently Asked Questions
What should I look for in a classroom solar system model?
Look for scientific accuracy first: eight planets in correct Sun-outward order per the IAU 2006 definition, Saturn’s rings, and sensible relative sizes. Then match the type to your teaching — a static model for order and names, a tellurion for seasons and eclipses, or an orrery for orbital motion — and confirm durability, base stability and a safe low-voltage supply on any motorised unit. The physics lab range lists the model types to compare.
Which solar system model suits the NCERT and CBSE science syllabus?
A static eight-planet model plus a tellurion covers most middle and secondary school requirements, with an orrery added for orbital motion in senior classes. NCERT and CBSE science introduce the Solar System, day and night, and seasons across the middle-school years, and NEP 2020 encourages model-based learning — but confirm the current chapter and edition on the NCERT portal before citing it in a tender, because the textbooks are being revised.
Are motorised solar system models safe for school classrooms?
Yes, when they use a low-voltage supply and carry the right documentation. Require battery operation or a certified SELV (safety extra-low voltage) mains adapter, no exposed live parts, and intact cabling, and ask for the adapter’s safety certificate. Also confirm a lead-free paint declaration and a stable base, particularly for younger learners.
How much does a classroom solar system model cost in India?
Costs vary widely by type, size and drive, so prices are best treated as RFQ-dependent. Static tabletop models are the most affordable, tellurions and orreries sit higher, and planetarium projectors and large floor models cost the most. Any figure should be confirmed in a written quotation, exclusive of applicable GST, with the HSN classification verified — request a quotation through the contact page.
How do I maintain a school solar system model or orrery?
Dust static models with a soft dry cloth and check the arm joints periodically. Keep orrery and tellurion mechanisms clean, turn gears gently and never force a stuck mechanism. For motorised units, inspect the adapter cable before use and remove batteries during long storage to prevent leakage, keeping spare bulbs and the teacher guide with the unit.
What is the difference between a solar system model, an orrery and a tellurion?
A solar system model is the general term for a physical representation of the Sun and planets, often static. An orrery is a mechanical model in which the planets revolve around the Sun to show orbital motion. A tellurion (or tellurium) focuses on the Sun–Earth–Moon relationship to demonstrate rotation, axial tilt, seasons, Moon phases and eclipses. Many schools use a static model and a tellurion together; the astronomy laboratory equipment guide explains the wider range.
Key Takeaways
1. Accuracy comes first: insist on the eight-planet IAU 2006 convention in correct Sun-outward order, and reject outdated nine-planet models.
2. Choose the type by teaching purpose — static model for order and names, tellurion for seasons and eclipses, orrery for orbital motion — using the physics lab range to compare options.
3. A tellurion must show Earth’s axial tilt at about 23.5 degrees, because that tilt is what teaches the seasons correctly.
4. No desktop model is to true distance scale; choose models that state “not to scale” and teach the scale caveat as part of the lesson.
5. On motorised units, require low-voltage battery or certified SELV-adapter operation and a lead-free paint declaration, and verify them at delivery.
6. Use the Classroom Solar System Model Acceptance Checklist in your PO, and confirm spares, warranty and documentation in writing before procurement through the contact page.
About Lab Exports
Lab Exports is a manufacturer, supplier and exporter of educational and scientific laboratory equipment, headquartered at Works: 11/315, Lalita Park, Laxmi Nagar, Delhi 110092, India, and supplying schools, colleges, universities, hospitals and institutional buyers in India and export markets since 1986. The company’s website lists certifications including ISO 9001, ISO 13485 and ISO/IEC 17025; buyers should request current, in-scope certificates against the specific product before procurement. For astronomy teaching models, explore the range across the categories below, or use the OEM / tender and contact pages for bulk and institutional supply.