The U.S. Federal Communication Commission has opened public comment periods on two space licensing applications with very high stakes for #astronomy. And two leading organizations have issued action alerts with instructions for submitting comments. (Note: non-U.S. persons and organizations may file FCC comments!)
DarkSky International: https://darksky.org/news/two-satellite-proposals-threaten-the-night-sky-the-window-to-act-is-now/
American Astronomical Society: https://aas.org/action-alert-provide-input-fcc-proposed-satellite-systems