⭐ Star Navigation & Coordinates
Te Kōkōrangi me ngā Whetū • Finding Your Way by the Stars
🧭 Master Navigators
Polynesian navigators crossed the Pacific Ocean — the world's largest body of water — using only the stars, waves, winds, and their knowledge passed down through generations.
They didn't have GPS, compasses, or maps. Instead, they memorized the positions of hundreds of stars and understood how the sky changes throughout the year. This is coordinate mathematics in action!
⭐ Key Stars for Pacific Navigation
Māhutonga
Southern Cross
Points to the South Pole
Matariki
Pleiades cluster
Marks the Māori New Year
Rehua
Antares
Bright red star of summer
Tākurua
Sirius
Brightest star in the sky
📍 Coordinates in the Sky
Astronomers use a coordinate system to locate stars, just like we use coordinates on a map!
- Altitude: How high the star is above the horizon (0° to 90°)
- Azimuth: Direction along the horizon (0° North, 90° East, 180° South, 270° West)
Traditional navigators memorized where important stars would rise and set — their azimuth positions — at different times of year.
📝 Activity 1: Star Map Grid
Plot these stars on the coordinate grid. The first one is done for you.
| Star | Coordinates (across, up) |
|---|---|
| Māhutonga (Southern Cross) | (3, 2) ✓ |
| Matariki | (7, 8) |
| Rehua | (5, 5) |
| Tākurua | (2, 7) |
📝 Activity 2: Navigation Challenge
A navigator is sailing from point A(2, 3) to point B(8, 7).
a) Plot both points on a grid and draw the route.
b) How many units East must they travel?
c) How many units North must they travel?
d) If they sail diagonally, will the distance be more or less than traveling East then North? Explain.
📝 Activity 3: Finding South
Navigators use the Southern Cross to find South. The long axis of the cross points toward the South Celestial Pole.
If Māhutonga rises at azimuth 150° and sets at azimuth 210°, what azimuth is it at when directly South?
Why is knowing the direction of South useful for navigation?
📚 Kupu Māori — Vocabulary
Star
Sky
North
South
East
West
👩🏫 Teacher Notes
Curriculum: NZC Level 3-4 Geometry — Position and orientation, Coordinate systems
Extension: Research the Hawaiian star compass (star houses); Use stellarium.org to explore the night sky; Calculate distances using Pythagoras.