Space looks very dark from Earth. But does the solar system, and the universe for that matter, have an area that's the ...

How fast and in which direction is our solar system moving through the universe? This seemingly simple question is one of the ...

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? When you purchase ...

On August 25th, 2012, humanity became an interstellar species. There was no fanfare or galactic welcome party as a humble robotic probe, the Voyager 1 spacecraft, crossed an invisible threshold. It ...