Tonight, right around sunset, there will be a partial eclipse of the sun, visible from most of North America.  As the sun sets, skywatchers will get to see the moon gradually cover about half of the sun, before it disappears below the horizon. A map of the viewing area shows that the best spot to see it will be all the way up in the Canadian arctic. If you don’t live in the Arctic circle, you can certainly see the eclipse in the South-West near the horizon as it sets.  The moon will start to cover the sun around 5:45 EDT,...