It Was a Universe-Shaking Announcement. But What Is a Neutron Star Anyway?

Here are answers to some questions you might have about the discovery that was announced on…

Space Council Chooses the Moon as Trump Administration Priority

Vice President Mike Pence accused the Obama administration of neglecting the space program, while others saw…

Elon Musk’s Mars Vision: A One-Size-Fits-All Rocket. A Very Big One.

Mr. Musk’s booster, scaled back from last year’s plan but still the largest ever, could take…

NASA’s Osiris-Rex Spacecraft Is Headed for a Flyby With Earth

The spacecraft will make a flyby of Earth on Friday, using the planet’s gravity to steer…

Back to Saturn? Five Missions Proposed to Follow Cassini

Although NASA does not have yet a follow-up mission to Saturn on its schedule, scientists are…

Cassini Vanishes Into Saturn, Its Mission Celebrated and Mourned

Orbiting the ringed planet since 2004, the spacecraft solved some mysteries and made discoveries that upended…

Jim Bridenstine to Be Nominated by Trump to Lead NASA

The former Navy pilot is in his third term in Congress and would be the first…

Trilobites: Casting Light on Mystery of a Star That Vanished After 14 Days

First spotted by Korean astronomers in 1437, scientists have found it again in the form of…

The Illuminating Power of Eclipses

With the sun obscured, eclipses can be revelatory: Starting at least over 2,000 years ago, they…

Chasing Shadows for a Glimpse of a Tiny World Beyond Pluto

From just five blinks of starlight, scientists now know more about the next destination of NASA’s…