Moon Setting in the Morning

After a night spent beneath the stars, dawn on Maunakea offers one final spectacle before the journey back to sea level begins. As the full Moon descended toward the western horizon, it slipped gently behind a sea of clouds blanketing the Pacific below, marking the quiet end to another night of exploration above the atmosphere.

The Moon's warm golden color is not intrinsic to its surface, but a consequence of its light passing through a much greater thickness of Earth's atmosphere near the horizon. Shorter blue wavelengths are scattered away, leaving the familiar amber glow that accompanies every moonrise and moonset. Atmospheric refraction subtly distorts the lunar disk, while thin layers of cloud soften its lower edge as it disappears from view.

This photograph was made during the drive down from the summit following a night's work at the W. M. Keck Observatory. Moments like these are never on the observing schedule, yet they become some of the most memorable—a quiet reminder that astronomy is not only about distant galaxies and ancient nebulae, but also about witnessing the familiar sky from an extraordinary place.