On July 10, 2025, skywatchers across the United States were treated to a spectacular sight as the Full Buck Moon illuminated the night sky. Reaching its peak brightness at 4:38 PM EDT, this full moon was not only a visual delight but also held special astronomical significance.
The Buck Moon derives its name from Native American traditions, marking the period when male deer, or bucks, begin to grow new antlers. It is also referred to as the Thunder Moon, a nod to the frequent summer storms characteristic of July.
This year’s Buck Moon coincided with Earth’s aphelion—the point in its orbit when it is farthest from the Sun—which occurred on July 3. This alignment made the Buck Moon the most distant full moon from the Sun in 2025, a rare occurrence that added to its allure.
Adding to the uniqueness of this lunar event was its low trajectory across the sky. Due to the timing near the summer solstice and the influence of the Major Lunar Standstill—a phenomenon that occurs every 18.6 years—the moon appeared lower in the sky than usual. This positioning enhanced the “moon illusion,” making the moon appear larger and more striking to observers.
The Buck Moon’s golden or reddish hue shortly after rising is attributed to Rayleigh scattering, the same effect that causes colorful sunsets. As the moon’s light passes through more of Earth’s atmosphere near the horizon, shorter wavelengths scatter, leaving the longer red and orange wavelengths to dominate.
In addition to its astronomical significance, the Buck Moon holds cultural and spiritual importance. In India, it coincides with Guru Purnima, a day dedicated to honoring teachers and spiritual mentors. Theravada Buddhists observe Dharma Day during this full moon, commemorating Buddha’s first sermon after achieving enlightenment.
Astrologically, the Buck Moon in Capricorn is seen as a time for reflection and setting long-term goals. Astrologers suggest that this lunar phase encourages individuals to evaluate their progress and plan for the future.
For those who missed the Buck Moon, there are still opportunities to observe its beauty. The moon will appear nearly full for a few days following its peak, offering continued chances for skywatching. Observers are encouraged to find a location with a clear view of the southeastern horizon shortly after sunset for the best experience.
This year’s Buck Moon served as a reminder of the intricate dance between celestial bodies and the rich tapestry of cultural interpretations that accompany such events. Whether viewed through the lens of science, spirituality, or personal reflection, the Buck Moon of 2025 offered a moment of wonder and connection to the cosmos.
