Baja California Sur has emerged as a premier astronomical destination, attracting tourists worldwide who seek the magic of the stars. The region boasts several prime spots for sky observation, thanks to its minimal light pollution.
The clarity of the night sky in Baja depends on multiple factors. Light pollution is a significant impediment to clear astronomical viewing, but weather conditions also play a vital role. Winter nights, known for their clarity, provide the best conditions for stargazing, whereas cloudy or warm nights can hinder visibility. Additionally, the moon’s phase affects visibility; nights with a new or crescent moon are ideal for observing the stars.
In their quest to find the darkest skies, the Astronomical Society (MIRA) discovered La Purisima in the municipality of Comondú, which boasts one of the darkest recorded skies in the state. MIRA’s recent study also highlights Mulegé as a key location for enjoying pristine night skies.
Miguel Ángel Norzagaray, a MIRA member and professor at the Autonomous University of Baja California Sur (UABCS), expressed astonishment at the exceptional quality of the night sky in La Purisima. Measurements taken at ‘Llanito de Los Becerros’ showed a remarkable magnitude of 21.85 per unit area, marking the darkest sky recorded in the region. For comparison, urban areas typically measure less than 18, while a rating of 20 is considered stellar for city dwellers. El Tecolote Beach scores 21.1, and Mulege, surpassing 21.5, is deemed an astronomical sanctuary.
This discovery is part of the ‘South California Sky Measurement’ project, a collaboration between UABCS, MIRA, and the South California Council of Science and Technology (COSCYT). The project aims to map the night sky’s quality across the state, confirming Baja California Sur’s status as having the darkest skies in the country due to its low population density.
The findings at La Purisima and Mulegé not only solidify the region’s reputation but also underscore the importance of protecting these sanctuaries from light pollution. The degradation of natural darkness impacts not only star visibility but also ecosystems and human health.
La Purisima, located 145 kilometers north of Ciudad Constitución, offers more than just starry nights. Its rich history, beautiful landscapes, springs, palm groves, and local hospitality make it an ideal spot for both astro-tourism and astronomical research. MIRA plans to return with more equipment to continue their exploration, emphasizing the need to preserve these dark skies for scientific research and future generations.
So, plot your course on Google Maps or your preferred navigation app, and prepare to witness the spectacular celestial displays of Baja California Sur.
