Gravity, inertia, and centripetal force keep our solar system in motion. Explore with a series of kid-friendly gravity and force experiments.

Travel through time to witness some of the most remarkable episodes in our solar system's history, uncovering its ancient ...

Celestial mechanics remains crucial in unraveling the mysteries of our inner solar system’s past.

Our sun has had close encounters with other stars in the past, and it’s due for a dangerously close one in the not-so-distant future.

Astronomers have been trying to understand the mysterious interstellar object that zipped through our solar system in 2017, dubbed ‘Oumuamua. A new study suggests answers about its color ...

Our entire local cluster of galaxies is also in motion. The best part: no motion sickness. Raymond Shubinski Contributing Editor This question and answer originally appeared in the May 2013 issue.

A group of astronomers from the US, Europe, Chile and South Africa have determined that 70,000 years ago a recently discovered dim star is likely to have passed through the solar system’s ...

Astronomers have confirmed the third interstellar object on record is dashing through our solar system. Dubbed 3I/ATLAS, it appears to be a comet and is thought to have flown in from the direction ...

(CNN) — A newly discovered object speeding through our solar system is sparking excitement among astronomers because it’s not from around here. Believed to be a comet, the object is only the third ...

The Oort Cloud, an expanse of icy bodies in the far reaches of our solar system, is shown here in a scene from "Encounters in the Milky Way," a show at New York City's Hayden Planetarium that ...

New discoveries of objects in the Kuiper Belt have also presented challenges for the Planet Nine theory. The latest is known ...