Current Prices
Amazon★
John Lewis
Smyths Toys
Zatu★
Lego
Argos
About LEGO Planet Earth and Moon in Orbit
This 526-piece building toy recreates the Earth, Sun and Moon system as a working mechanical model. The finished construction measures 33 cm long, 24 cm high and 18 cm wide, creating a substantial display piece that demonstrates planetary motion through hands-on interaction.
The model features a hand-operated crank mechanism that drives the orbital motion. Turning the crank shows how Earth and the Moon travel around the Sun, with the Moon simultaneously orbiting Earth. The model includes detailed month indicators and moon phase displays, helping to illustrate how Earth's position in its orbit creates seasonal changes throughout the year.
Educational Features
The set incorporates scientific accuracy alongside mechanical function. Month markers around the Sun's orbit correspond to Earth's position, while the Moon phases change as the satellite completes its cycle. This provides a tangible way to understand astronomical concepts that are often difficult to visualise from textbooks alone.
Designed for builders aged 10 and up, the model combines LEGO Technic building techniques with space science education. The mechanical elements require some technical building skills while delivering an engaging result that demonstrates real astronomical principles through physical interaction.
Where to Buy LEGO Planet Earth and Moon in Orbit for the Best Price
We've been tracking prices for this set since November 2025. The recommended retail price is £69.99. It's currently available from 6 retailers, with Amazon offering the best price at £55.99, which is 20% below RRP. The lowest price we've ever recorded was £42.90 at Amazon in December 2025, 39% off RRP. Over its tracked history, prices have ranged from £42.90 to £119.07. This set is expected to retire next year, so prices may increase as availability decreases.
Set Details
- Set Number
- 42179
- Pieces
- 526
- Theme
- Technic
- RRP
- £69.99
- Best Price
- £55.99
- Price per Piece
- 0.11p






