A meteorite found in the Sahara is forcing scientists to rethink what kinds of worlds once circled the young sun. The rock, ...

As it turns out, the conditions that set Venus and Jupiter up for their conjunctions in the sky are the same that are ...

The outer solar system once seemed like a quiet backwater. But a glut of tiny, strange moons with unruly orbits are coming ...

Our solar system may have hosted up to six giant planets in its first hundred million years, a new study suggests. The ...

Scientists may have found one of the main sources of rocky material for the solar system, forming diverse populations of baby ...

The hunt for Planet Nine continues as new discoveries make the Solar System’s biggest mystery even harder to solve. Is there ...

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

The names of the days often feel so familiar that they pass unnoticed. They appear on calendars, meeting schedules and phone ...

The workings of our solar system are roughly the same now as they have been for millions of years. Moons circle their planets, the planets circle the sun, the sun’s magnetic fields and sunspots wax ...

Unlike rocky planets such as Mars and Earth, angrites do not have a lot of silicon dioxide. Because of this, astronomers have ...

Venus takes about 243 Earth days to complete a single rotation, and it does so in the opposite direction from nearly every ...

Using the Keck Observatory, astronomers measured the spins of dozens of giant planets and brown dwarfs orbiting distant stars ...