The K-type star Errai - or Gamma Cephei to give it its official name - is the first future North Star on our list. In just 2,200 years Errai will be situated a mere 3 degrees from the north celestial ...

Observed with their sharp-eyed instruments, the earth’s rotation is a wobbly ... is a grand motion that makes its axis describe a 23° cone once every 26,000 years. This precession is caused ...

One is its diurnal rotation ... As a consequence, the direction of Earth’s axis slowly wobbles in space, making a complete circle once every 26,000 years or so. That circle is 47 degrees ...