Toy gyroscopes can do all kinds of interesting tricks. The most mysterious one, precession, seems to defy gravity. By definition, precession refers to a change in the orientation of the rotational ...

The sun's distance from Earth changes throughout the year but it has nothing to do with the seasons. When you purchase through links on our site, we may earn an affiliate commission. Here’s how it ...

When you purchase through links on our site, we may earn an affiliate commission. Here’s how it works. The Earth's precession is captured in stunning detail in this image by a veteran ...