A supernova is the cataclysmic explosion of a star. A thermonuclear supernova explosion of a white dwarf is supposed to be the terminal event in the life of its progenitor star. These thermonuclear … [+4899 chars]
We no longer waste water, so why do we waste so much light? That is a problem that has been taken up by Northern Beaches resident Marnie Ogg (main image) who has been designated a Dark Sky Defender … [+1215 chars]
