Long ago, a planetary object eight times the mass of Jupiter may have once visited the solar system and altered the orbits of the four outer planets-Jupiter, Saturn, Uranus, and Neptune. It could ...

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 ...

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 ...

ESA's Gaia mission has determined he orbits of 154,741 asteroids in our solar system. Credit: ESA/Gaia/DPAC ...

Add Yahoo as a preferred source to see more of our stories on Google. An illustration showing Planet Nine, a hypothetical, undiscovered planet in our solar system. New research now suggests the ...

The orbits of the planets around the Sun have been the source for many a scientific debate. Their current orbital properties are well understood but the planetary orbits have evolved and changed since ...

Our solar system’s latest and only third known interstellar visitor is becoming more fascinating by the week. Spotted in early July, the object, dubbed 3I/ATLAS, is widely believed to be a comet. It’s ...