Add Yahoo as a preferred source to see more of our stories on Google. The sun is believed to be 4.6 billion years old, but how long this glorious plasma ball exactly took to form is still unknown. A ...

The standard story of the origin of our solar system has gone like this: 4.6 billion years ago, a giant cloud of dust hung frozen in space. Then the explosion of a nearby star caused part of that dust ...

For billions of years before reaching its current location, the Sun may have slowly travelled as part of a large group, or “wave,” of stars drifting out from the inner parts of the Milky Way. This ...