Axios: “Some stargazers have to travel more than 200 miles to see a sky devoid of light pollution. Why it matters: Dark skies are vital for the function of local ecosystems and our understanding of the universe. As light pollution grows each year, truly dark skies might get harder to find. By the numbers: The U.S. has over 60 dark sky places certified by the International Dark-Sky Association. Nine are “sanctuaries,” areas of remote wilderness specifically protected for exceptional stargazing. Hundreds more, while not certified, have low-enough light pollution to warrant a visit…”