Lying at the very outskirts of our solar system, the ice giant Neptune has long represented both a challenge and a mystery to astronomers and space explorers alike. The dark and cold planet, the ...

In pictures of the farthest planets from the sun, Uranus looks like a pale-green orb, while Neptune usually looks much bluer. A new analysis revealed their true colors. Here's NPR's Nell ...

Neptune, one of the farthest planets from the sun, has the longest orbit, with one year lasting 165 Earth years. Donald Trump's remarks about Putin leave Russian state TV stunned Kate Middleton’s ...