Though slow, precession was discovered with the naked eye by Hipparchus of Nicaea around 150 B.C. In ancient times, the vernal equinox – or the first day of spring – was in Aries.

To picture this precession, imagine a literal pole extending out of Earth at the North Pole. Watching this pole over the course of 25,800 years, we would see it trace out a circle over the Earth.

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

Though slow, precession was discovered with the naked eye by Hipparchus of Nicaea around 150 B.C. In ancient times, the vernal equinox — or the first day of spring — was in Aries.

This is essentially what's happening to Earth, what's known as "precession." In fact, our planet's tilt is making this circle over the course of 26,000 years, which is why the North Star, or ...

Although only incidental to the Bard’s canon, Earth’s precession is actually crucial to astronomers. We use a coordinate system on the sky that is very much like longitude and latitude.

As Earth wobbles due to precession, do the seasons change in regard to the months (i.e., 13,000 years from now, will June be winter for the Northern Hemisphere and December summer)? Greg Smith ...

Astronomy Astronomers are shocked to find our galaxy's nearest neighbor is being torn ... The discovery of the precession rate of the warp is described in a paper published on June 27 in Nature ...

Though slow, precession was discovered with the naked eye by Hipparchus of Nicaea around 150 B.C. In ancient times, the vernal equinox – or the first day of spring – was in Aries.

I was born a Capricorn (please don’t judge me), but the sun was in the middle of Sagittarius when I was born.As a professor emeritus of astronomy, I am often asked about the difference between ...