Saturn’s rings are an arresting sight even through modest telescopes. The planet is made mostly of hydrogen and helium whereas the rings are billions of pieces of mostly bright-white water ice and ...

Planet demographics reveal a puzzling lack of worlds in a certain size range throughout the galaxy F or centuries our solar system was the only planetary system known to humans. We had no proof other ...

"Pale Blue Dot" – one of the last photos taken by Voyager 1 – is still the most distant image of the Earth. Astronomer Carl ...

Interplanetary contamination risks from space missions and strategies to mitigate them, including the importance of ...

Trans-Neptunian objects (TNOs) are icy bodies that vary widely in size, from large dwarf planets like Pluto and Eris—each ...

NASA’s Cassini spacecraft, which orbited Saturn from 2004 to 2017, took many dramatic images of the rings’ shadows on Saturn.

Make time soon to head outside after the sun sets and study the sky. Five of the brightest planets — Venus, Jupiter, Mars, ...

The universe's unexplained phenomena, such as mysterious signals and invisible matter, challenge scientists to uncover deep ...

Scientists are studying Saturn's moon Titan to assess its tidal dissipation rate, the energy lost as it orbits the ringed planet with its massive gravitational force. Understanding tidal dissipation ...

What can a moon’s tidal friction teach us about its formation and evolution? This is what a recent study published in Science ...

During the latest round of layoffs, the tiny team was among the hundreds let go. And though some parts of the educational program remain, educators across the country mourn what was lost.

In his inauguration speech in January, United States President Donald Trump declared the US would "plant the stars and stripes on the planet ...