NASA personnel will soon be in Colorado for a celestial event that hasn’t been visible from North America in more than a decade. On Oct. 14, Mesa Verde National Park in Southwest Colorado will be almost directly in line with the annular solar eclipse. During this type of event, the moon comes between the Earth and the sun and blocks most of the light. Because the moon will be at one of its furthest points away from the Earth, the moon will appear smaller than the sun and not block its light completely.