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How long is a day on Saturn? Using data from NASA's Cassini spacecraft, scientists have the best answer yet to a central question about the planet. from News and Features - NASA's Jet Propulsion Laboratory https://go.nasa.gov/2Cws1s6

New measurements of the mass of Saturn's rings reveal their age - and something they have in common with dinosaurs. from News and Features - NASA's Jet Propulsion Laboratory https://go.nasa.gov/2VUMLmx

A brief and unusual cosmic flash nicknamed "the Cow" has puzzled astronomers and astrophysicists around the globe, prompting multiple explanations for its origin. from News and Features - NASA's Jet Propulsion Laboratory https://go.nasa.gov/2TFkBd6

There are thousands of known exoplanets - planets orbiting stars other than our Sun - but citizen scientists have helped discover one that has a rare quality. from News and Features - NASA's Jet Propulsion Laboratory https://go.nasa.gov/2D11Zim

The asteroid will fly safely past Earth on Saturday, Dec. 22, at a distance of about 1.8 million miles (2.9 million kilometers). from News and Features - NASA's Jet Propulsion Laboratory https://go.nasa.gov/2EHWrva

Inside NASA's Cold Atom Lab on the International Space Station, scientists are creating something colder than a winter's night in Antarctica - or even the dark side of the Moon. from News and Features - NASA's Jet Propulsion Laboratory https://go.nasa.gov/2AbhAtK

In deploying its first instrument onto the surface of Mars, the lander completes a major mission milestone. from News and Features - NASA's Jet Propulsion Laboratory https://go.nasa.gov/2Sfm5dJ

An adolescent star in the midst of a dramatic growth phase has been observed with the help of two NASA space telescopes. from News and Features - NASA's Jet Propulsion Laboratory https://ift.tt/2SW2oYt

Reconstructing Mars here on Earth lets them practice setting down the lander's science instruments. from News and Features - NASA's Jet Propulsion Laboratory https://ift.tt/2GsdOC3

Student teams raced against the clock - and one another - as they competed to be the first to stand a pipe upright using only homemade inventions. from News and Features - NASA's Jet Propulsion Laboratory https://ift.tt/2Bq6XDb

On Sunday comet Wirtanen will make one of the 10 closest flybys of Earth in more than 70 years. from News and Features - NASA's Jet Propulsion Laboratory https://ift.tt/2SOQTSr

Look closely, and you can make out the lander's solar panels. from News and Features - NASA's Jet Propulsion Laboratory https://ift.tt/2UGsy3b

Asia's high mountain glaciers are flowing more slowly as they melt, affecting the water supply of the arid plains below the peaks. from News and Features - NASA's Jet Propulsion Laboratory https://ift.tt/2UFUxzQ

Upcoming 16th science pass of Jupiter marks Juno's halfway point in prime mission data collection. from News and Features - NASA's Jet Propulsion Laboratory https://ift.tt/2C7FtDP

Two new image mosaics detail the lander's deck and "workspace" - the surface where it will eventually set down its science instruments. from News and Features - NASA's Jet Propulsion Laboratory https://ift.tt/2SIT9e9

For the second time in history, a human-made object has reached the space between the stars. from News and Features - NASA's Jet Propulsion Laboratory https://ift.tt/2zRdkj3

Vibrations picked up by two spacecraft instruments have provided the first sounds of Martian wind. from News and Features - NASA's Jet Propulsion Laboratory https://ift.tt/2PpsyRj

OSIRIS-REx observations of asteroid Bennu will improve predictions of which asteroids could be on a trajectory that could pose a risk to Earth. from News and Features - NASA's Jet Propulsion Laboratory https://ift.tt/2QAlFBi

Now unstowed, the spacecraft's robotic arm will point a camera located on its elbow and take images of the surroundings. from News and Features - NASA's Jet Propulsion Laboratory https://ift.tt/2Pks27b

Upcoming 16th science pass of Jupiter marks Juno's halfway point in prime mission data collection. from News and Features - NASA's Jet Propulsion Laboratory https://ift.tt/2C7FtDP