This year, the hundreds of thousands of people gathered to watch fireworks on Washington's National Mall will see one extra light in the sky. If clouds don't obscure it, the International Space Station will be visible for seven minutes as it passes over North America.

The station will appear on the northwest horizon at 9:35 p.m. EDT, moving higher and into the northern sky before descending toward the eastern-southeastern horizon. At 9:40 p.m. EDT, the station will be in the northeast sky with an elevation of 50 degrees, meaning it will be more than halfway up toward the zenith, the point of the sky directly overhead. Just after 9:42 p.m., the station will disappear below the eastern-southeastern horizon.