“Whether it is real or not, it is 100 percent NOT Planet Nine,” Brown says. “Planet Nine is a prediction based on inferred ...

A glass bead retrieved by China's Chang'e-5 lunar mission is offering a glimpse into the moon's hidden interior and violent past. Witness live views of Earth from the International Space Station as it ...

So which planets in our solar system have rings? All four giant planets — Jupiter, Saturn, Uranus and Neptune — sport these ...

"Rings are mostly made of ice and small rocks," said William Saunders, a planetary scientist at NASA's Langley Research ...