Across the galaxy, astronomers now see that planetary systems fall into four broad classes, and our own solar system, part of the rare Ordered group, is only one of them. At the same time, discoveries ...

We live on a planet that seems motionless, yet Earth orbits the Sun at a dizzying speed, and our entire Solar System moves ...

Our Solar System orbits the galactic center at an estimated 792,000 kilometers per hour, taking 225 million Earth years to ...

Could we turn our solar system into a spaceship and drive the Sun around the galaxy? Interstellar travel is horrible and deadly. Much safer to stay on here Earth with our gloriously habitable ...

Still, science being science, we needed proof—and we got it in 1992, when two astronomers found two planets orbiting a pulsar ...

Eros appears to buzz the Andromeda Galaxy, courtesy of a livestream hosted by the Virtual Telescope Institute in partnership ...

A spiral galaxy, shaped much like our Milky Way, has been found in an era when astronomers believed such well-formed galaxies ...

As it heads out of the solar system never to return, the deep space probe Voyager 1 is headed for yet another cosmic ...

In 1995, a pair of scientists discovered a planet outside our solar system orbiting a solar-type star. Since that ...