The Earth's shadow will creep across the moon's surface early Tuesday, slowly eclipsing it and turning it to shades of orange and red.
The total lunar eclipse, the second this year, will be visible in North and South America, especially in the West. People in the Pacific islands, eastern Asia, Australia and New Zealand also will be able to view it if skies are clear.
People in Europe, Africa or the Middle East, who had the best view of the last total lunar eclipse in March, will not see this one because the moon will have set when the eclipse begins at 4:51 a.m. EDT (0851 GMT). It will take an hour to reach full eclipse stage.