Earth’s shadow blots out this week’s full moon
With sunrise now after 7am, perhaps you’ve seen an exceptionally bright light in the south before dawn? Looking up, did you see the constellation Orion? That’s Sirius, the brightest star in the heavens, known as the Dog Star for its place amid Canis Major. Sirius rises around 2am in the east-southeast. Close to the horizon, it pulses a dazzling rainbow of colors, its light refracted by earth’s atmosphere like that from a prism. Closer to daybreak, when Sirius is high in the south, its light cuts through less of our atmosphere and appears a brilliant, cold white.