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 ...

For the first time since 2008, two new planets are being added to one of northern Maine's most famous — and scientifically accurate — roadside attractions. Dwarf planets Haumea and Makemake are the ...

Somewhere beyond Neptune, the Kuiper Belt is bent. Not by much, and not in a way any known planet can account for. A study ...

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 ...