My first thought was light pollution, which they mentioned, but some are even saying that it could make it fifty times worse.
China Plans to Launch an 'Artificial Moon' to Light Up the Night Skies
China's 'Fake Moons' Could Make Light Pollution Almost Fifty Times Worse, Warns Astronomer
China Plans to Launch an 'Artificial Moon' to Light Up the Night Skies
China's 'Fake Moons' Could Make Light Pollution Almost Fifty Times Worse, Warns Astronomer