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While the Sun describes a semi-circle in the sky, stars near the celestial pole,
the area of the sky the Earth's axis of rotation points to, appear to describe
a circle around a static point. This sequence accumulates the light of each
stars as it moves across the sky. The star Polaris created the brightest
semi-circle near the center. This 9 hour sequence is near a third of day and
therefore yields star trails that are one-third of a full circle.
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| Time period: | Night |
| Light source: | Moon |
| Start time: | 20:00 |
| Duration: | 9 hours |
| Acceleration: | x 2600 |
| Location: | Mauna Kea |
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