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 ...

Astronomers have found a distant world that challenges planetary formation theory, with a rocky planet where gas giants should be.

A scale model of the solar system, with each planet depicted in relief on individual square granite markers installed atop concrete bases embedded in the ground. Each planet bears a laser etched ...

Astronomers have discovered an exoplanetary system, 116 light-years away, that could redefine our understanding of how ...