This is the first time that disk-jet co-precession has been clearly observed in a black hole system, which is truly exciting, ...

A star’s fatal brush with a supermassive black hole can light up a quiet galaxy. When gravity shreds the star, its gas ...

The Gregorian calendar accounts for the discrepancy between the length of a solar day and a solar year (approximately 365.25 days). The calendar also addresses the difference between a sidereal year ...

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 ...

It wasn’t too long after Newton published his laws of motion that people noticed something was off about them. To be specific, they were off by the orbit of an entire planet. And they remained off ...

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 ...

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 ...

The Milankovitch cycles describe how relatively slight changes in Earth's movement affect the planet's climate. The cycles are named for Milutin Milankovitch, a Serbian astrophysicist who began ...