As the United States prepares to celebrate its 250th anniversary, the history of the solar system tells its own story of ...

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 ...

Even at a glance, the planets in our solar system are wildly diverse. Huge and small, airless and densely packed with atmosphere, they have a wide range of characteristics distinguishing them. But if ...

While life on Mars (and Venus) has long been an obsession for those wondering if we're alone, there are other places in our ...