An investigation, carried out by the astrophysicists of the Instituto de Astrofísica de Canarias (IAC), questions one of the ...

New research suggests that Earth’s orbital variations—the slow changes in its tilt, axial precession, and shape of its ...

Most of the earth’s wobbling is a grand motion that makes its axis describe a 23° cone once every 26,000 years. This precession is caused by the pull of the sun and the moon acting on the ...