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 ...

Rather than slowly condensing over millions of years, the first building blocks of Earth and other planets may have formed ...

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 ...

Add Yahoo as a preferred source to see more of our stories on Google. An artist’s concept shows the inner regions of a ...