Astronomers from the University of New South Wales have identified 27 potential circumbinary planets—worlds orbiting two stars—using a refined technique called apsidal precession. Unlike the widely ...

Astronomers have identified 27 candidate planets orbiting binary star systems using a novel detection method based on apsidal precession, rather than traditional light-dip transits. The findings, ...

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 calendar is based on Earth’s motions, and Earth’s motions aren’t particularly kind to the calendar. For one thing, a day (based on Earth’s rotation) and a year (based on Earth’s revolution around ...

ALTHOUGH the Earth revolves around the Sun, from our point of view we see the Sun moving around the sky along an imaginary circle called the ecliptic once every 365.256 days. This is known as the ...