Earth’s gravity has a lot to do with what people think is up and what is down. Things fall down toward the ground, but that ...

A massive interstellar object passing through our solar system during its formative years likely altered the orbits of planets into trajectories observed today, a new study says. Interactions with ...

Triton is one of the strangest moons in the solar system. It orbits Neptune in the opposite direction of the planet’s rotation, suggesting it was once a wandering object captured from the distant ...

Scientists have been trying to find a hypothetical Planet 9 that may exist outside our known solar system based on the unusual orbits of certain dwarf planets. But those orbits might not require a ...

NASA’s Double Asteroid Redirection Test, known as DART, did more than shove a small asteroid into a tighter loop around its ...

The Sun is an incandescent but benevolent dictator. For billions of years, it’s kept our star system well organized through the influence of its powerful gravity. All the planets revolve around it on ...

EVANSTON, Ill. — Except for the fact that we call it home, for centuries astronomers didn’t have any particular reason to believe that our solar system was anything special in the universe. But, ...

When I was a kid, the solar system was simple. There were nine planets and they all orbited in more-or-less circles around the sun. This same sun-and-a-handful-of-planets scheme repeated itself again ...

ESS2.C: The Roles of Water in Earth’s Surface Processes Water is found in the ocean, rivers, lakes, and ponds. Water exists as solid ice and in liquid form. ESS2.A: Earth Materials and Systems (3-5) ...