The number of planets that orbit the sun depends on what you mean by “planet,” and that’s not so easy to define ...

Outreach Coordinator Shea Harris said it is an accurate model of the solar system, at one ten-billionth of its actual size. “It kind of gives you a feeling of how big our solar system is as you ...

Scientists suggest an interstellar visitor may have altered planetary orbits in our Solar System, reshaping trajectories of ...