(Ianm35/iStock/Getty Images Plus) The Solar System is one of the comforting constants of human existence. No matter what else ...

Jupiter, Saturn, Uranus and Neptune did not always have their current positions in the solar system. According to the ...

Looking at the Solar System, Jupiter and Uranus both have plenty of irregular moons. In supercomputer simulations, the ...

Our solar system may have hosted up to six giant planets in its first hundred million years, a new study suggests. The findings paint a more crowded picture of the early outer solar system than ...

Hints of high-pressure chemistry within a rare meteorite suggest this fallen space rock comes from a planet gone wrong in the ...

Scientists found proof that a giant early planet existed in the solar system 4.5 billion years ago.

China is in the final stretch toward launching Chang’e-7, the most complex robotic Moon mission it has ever attempted, built ...

Much of modern astronomy revolves around the study of strange alien worlds—from the sun’s retinue of satellites to the thousands of known exoplanets orbiting other stars. The discovery has major ...

The Moon’s surface has been sampled, scanned, and photographed for decades, yet one of the most basic questions about it ...

Every planet, moon, asteroid, and comet in the solar system combined accounts for a sliver of its total mass. The Sun holds ...

Above a certain threshold, galaxies stop growing , no matter how much raw material they have on hand. The question is: what ...

NASA announced new contracts for the rovers and landers that will lay the groundwork for the agency’s proposed $30-billion Moon Base — some of which they plan to launch as soon as this fall — during a ...