Celestial mechanics

An international team of researchers recently simulated the unstable celestial mechanics of the early solar system

In the final moments of its 27-year mission, spacecraft Cassini took one final look at one of Saturn’s unsolved mysteries.

“Peggy” is a glitch that appears to be a disturbance in Saturn’s rings.

(Click to enlarge images)

Spring starts in Earth's northern hemisphere

BELGRADE -- The spring equinox, the official start of the spring season in the northern hemisphere, this year falls on March 20.

At the same time, fall is beginning in Earth's southern hemisphere.