The location of the solar system's outer boundary is a point of contention among astronomers. There are three possible candidates, which "all have merit." But which one is best?

In 4.5 billion years, the sun will die. Here's the solar system's fate when that day comes.

Every 230 million years, the sun—and the solar system it carries with it—makes one orbit around the Milky Way's center. Though we can't feel it, the sun traces its orbit at an average velocity ...

Artwork: Six worlds around a star like our Sun are ideal to study how planets formed and whether they are home to life Researchers have located "the perfect solar system", forged without the ...