rotation

International Earth Rotation Service Calls for a Leap Second

December 24, 2008 / 2 Comments

The International Earth Rotation Service is calling for a leap second - the 24th of its kind since the first in 1971. I wonder what they did before that? At midnight GMT (Greenwich Mean Time) on December 31st, the world will stop while a second is added to clocks everywhere. The Earth rotates at different speeds in different years. The moon's ...