actual size 14 cm
Perpetual Lunar Calendar
€36.00
Astronomy, Spectra series
- Parts
- 88
- Build
- 3 hrs 30 min
- Level
- Intermediate
actual width 20 cm
Astronomy, Spectra series
Desk Sextant
€40.50
In stock, ships within 2 business days
A working copy of the navigator's sextant: index arm with sights, an arc graduated from 0 to 120°, a half-silvered mirror and a sighting telescope. Sight a first object, swing the arm until the image of the second sits on it, then read the angle on the arc. Never sight the Sun without a suitable filter.
- Parts
- 105
- Build
- 4 hrs
- Level
- Intermediate
- Footprint
- 20 × 18 × 8 cm
- Weight
- 380 g
- Glue and battery
- None
Intermediate: several articulated parts
Order today: shipped by Thursday 12 November at the latest.
Free delivery in France on orders from €99.
- Missing part replaced free
- Ships within 2 business days
- 14-day returns
- Illustrated manual included
Ages 14 and up. Contains small parts.
Desk Sextant in detail
The story
The sextant was born around 1757, when Captain John Campbell enlarged John Hadley's octant. For two centuries it let navigators fix their position at sea by measuring the height of a star above the horizon. It is still carried aboard many ships today, as a backup to GPS.
What you'll see move
Sight the horizon, swing the index arm, and the image of a second object comes to rest on the first: read the angle on the graduated arc. You are really measuring the gap between two distant points, just as sailors did. Never sight the Sun without a suitable filter.
Specifications
- Number of pieces
- 105 pieces
- Assembly time
- 4 hrs
- Difficulty
- Intermediate
- Dimensions
- 20 × 18 × 8 cm
- Weight
- 380 g
- Material
- PLA with 30% wood fibre
- Hardware
- Micro-screws and ball bearings included
- Glue required
- None
- Battery required
- None
In the box
- 105 wood-fibre composite parts, ready to assemble
- Micro-screws and ball bearings
- Illustrated step-by-step assembly manual
- No glue and no batteries: everything fits together and turns by hand
14+
Ages 14 and up. Contains small parts: not suitable for children under 3, choking hazard.
From the same family
actual size 30 cm
Solar Orrery
€76.50
Astronomy, Omega series
- Parts
- 230
- Build
- 10 hrs
- Level
- Expert
actual size 22 cm
Earth-Moon Orrery
€46.80
Astronomy, Spectra series
- Parts
- 120
- Build
- 5 hrs
- Level
- Advanced