In Disney's "Moana", we get a hint of a Polynesian wayfinding technique of holding your hand to "measure the stars" (note, you're not giving the sky a high-five). We get to see two different constellations measured: Crux (the Southern Cross), and Orion.

By matching the positions of the stars either in real life or on Stellarium, I was able to figure out something of how the Southern Cross is used. You place your fingers against the four brightest stars (two pointers plus the two brightest of the cross itself), and then the south celestial pole is right in the curve of your outstretched thumb. (Aside: It makes an awesome demo in Stellarium to place your hand on the screen, do the measurements, and then turn on the grid, highlighting the south pole beautifully.)

What I haven't managed to do, though, is match the corresponding measurement in Orion. The fingers are placed near Orion's belt and heel, but I can't figure out what is being measured. Can anyone provide either certain information, or plausible guesses?

(I can provide a screencap if there's an appropriate way to include it in the question.)

  • $\begingroup$ It would be very helpful to draw a diagram of the night sky w/ Orion and the placment of your fingers. Further, if the movie doesn't state what is being measured or determined, why are the characters doing the measurement? $\endgroup$ Commented Feb 21, 2017 at 12:12
  • $\begingroup$ The movie doesn't state specifically, but they're working out how to get to where they want to go (or perhaps how to get home after). Wayfinding involves reading the winds, the tides, and the stars. I'm interested in the latter part. $\endgroup$
    – rosuav
    Commented Feb 21, 2017 at 13:16
  • $\begingroup$ Re diagram - is it okay to include a screencap from the movie itself, and if so, how? @CarlWitthoft $\endgroup$
    – rosuav
    Commented Feb 21, 2017 at 13:16
  • $\begingroup$ If you're talking about Alnitak (leftmost belt star) and Saiph (left log, not really a heel), they have almost the same right ascension, so a line drawn through them would also point to the celestial south pole. $\endgroup$
    – user21
    Commented Feb 21, 2017 at 15:25
  • $\begingroup$ Note that the middle belt star forms an almost perfect north-south line with the sword. $\endgroup$
    – user21
    Commented Feb 21, 2017 at 15:34

1 Answer 1


This is from an article in the Conversation, by Duane W. Hamacher, and Carla Bento Guedes:

"Voyagers measure the angles between stars and the horizon using their hands. The width of your pinkie finger at arm’s length is roughly one degree, or double the angular diameter of the Sun or Moon.

Hold your hand with the palm facing outward and thumb fully extended, touching the horizon. Each part of your hand is used to measure a particular altitude.

Finding North

The hand method used by Nainoa Thompson to find the altitude of the Polaris. Journal of the Polynesian Society In Hawai'i, the “North Star”, Polaris, is Hokupa'a, meaning “fixed star”. It lies close to the north celestial pole. The altitude of Hokupa'a indicates your northerly latitude.

In the film, we see Moana Waialiki using this technique to measure the altitude of a group of stars. Look closely and you can see that she’s measuring the stars in Orion’s Belt. The position of Moana’s hand indicates the star above her index finger has an altitude of 21º. Given that the movie takes place about 2,000 years ago near Samoa, the position of Orion indicates they are travelling exactly due East.

Moana's measurement

Moana measures altitude of Orion’s belt stars. Walt Disney Studios Motion Pictures Later in the film, we see Moana navigating by following Maui’s fish hook. In the various Polynesian traditions, the hook was used to pull islands from the sea. It is represented by the constellation Scorpius, which rises at dusk in mid-May. This indicates southeasterly travel.


Looking at Scorpius - Maui’s Hook - in the same orientation as shown in the film. Stellarium However, the positions of the stars are not fixed in time. Over the 3,500 years that Polynesians have been exploring the Pacific, the stars have gradually shifted due to precession of the equinoxes.

From the latitude of Samoa, the Southern Cross has lowered from 60º altitude in 1500 BCE to 41º today. Those navigating by the stars must gradually adjust their measurements as the positions of stars slowly shift over time."

  • $\begingroup$ Thank you! Seems I was completely on the wrong track with measuring the south celestial pole, but this makes a lot of sense. $\endgroup$
    – rosuav
    Commented Jun 30, 2017 at 4:13
  • $\begingroup$ Unless I'm missing something here, the last paragraph of this answer is incorrect. On average, a star shifts 0.1 arc seconds per year. That means it would take 3,600 years to shift a single degree (two widths of the full Moon.) Instead of a 19º shift, it is more like a 3,521 arc second shift, or a 0.97º shift. Remember, various cultures' astronomical and astrological systems that existed in 1500 BCE, and even earlier, are rooted in the very same constellations we can still see today. $\endgroup$ Commented Sep 15, 2021 at 5:42

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