For those aware that there is a thing called the sky, tonight will present those of us located on the continental United States with a “supermoon,” as newspaper headline writers love to call it.
The Moon’s orbit around the Earth is not a perfect circle; it varies from 221,000 miles away to just over 252,000 miles away. Tonight, it will be at perigee, or its closest point in its orbit, and that will coincide with the full moon. Thus, tonight’s full moon will appear enormous: 14% larger than the average full moon and many times brighter than average. And then the Earth’s shadow took it away in an eclipse, because that’s what the Earth does.