Even light from a first quarter moon can't prevent the stars from shining brightly over the Mungo National Park in southeastern Australia.  Along the Milky Way, several prominent features are easily visible: the pinkish hue of the Eta Carina Nebula (left center),  the bright stars Beta and Alpha Centauri (just above the horizon) and―midway between the two―the exquisite constellation of Crux, the Southern Cross.  Just to the right of the Cross appears a dark "hole" in the Milky Way;  this is known as the Coal Sack, a massive cloud of gas and dust that's seen in silhouette against the more distant stars.