... Dark skies, venders, accommodations, great speakers, door prizes, solar viewing ... a food service vendor made it easy to relax and save the energy for the night sky ...
... Some nebulae are illuminated by nearby stars (bright nebulae), while others remain dark and are only seen if they obscure a brighter object (dark nebulae). ...
... nuclear emission region (LINER) at M104's heart may be the energy source that weakly ionizes the gas in the Sombrero Galaxy ... And what of the dark dust ring? It's cold atomic hydrogen gas. ...