Where does the solar system end and interstellar space begin? That's a question scientists have been working to answer using spacecraft traveling beyond the sun's influence. A team of researchers from ...

Humans love an origin story. And in space science, there is no greater question than why Earth is the vibrant, living planet we see today. As humans return to the heavens, understanding our planetary ...

Some 4.6 billion years ago, when the solar system was born from a vast cloud that collapsed to form the sun and a surrounding disk of whirling gas, no planets yet orbited our star. Back then, besides ...

For obvious reasons, the Sun’s influence weakens as you get closer to the edge of the solar system. But things might be a lot more complicated than we previously thought, according to a new study.