The solar system is difficult to show correctly. Why? It is difficult because the size of things are vastly different. Let me use units common in solar-system astronomy, the Astronomical Unit (or AU).

Which solar system model is best? For as long as humans could look up at the night sky, we’ve been fascinated with the stars. How far away are they? Where did they come from? What secrets do they hide ...

While its star projector leaves a lot to be desired, the Science Can Solar System Planetary Projector is a fantastic educational tool for kids, with its solar system model, complete with talking ...

Get your scrolling hand ready. An interactive web page has created a scale model of the solar system, where the moon is the size of just one pixel. Michelle Starr Science editor Michelle Starr is CNET ...

Astronomers and geologists have several techniques for dating Earth, and, therefore, the age of the solar system. From the radiometric dating of rocks, which measures the known decay rates of ...

If you had a few billion dollars and some of the most talented space scientists and engineers in the world, where would you go? There's no wrong answer, really. Even if you narrow it down to just the ...