What is going on with my moon?
Europa, the outer solar system, and a lot of questions.
James Webb is now slated for a 2021 launch—only a bajillion years late.
New Horizons scientist Leslie Young discusses what to expect from the flyby on Tuesday, and the 28-year wait leading up to it
In the December 1980 issue of Popular Science, a 38-year-old theoretical physicist answers the ultimate question about the universe.
Imagine the space-scuba diving potential
Short answer: a time machine
Not quite ready for takeoff
Here are eight surprising things NASA has learned so far.
A look back at the spacecraft's greatest discoveries
Deep under the icy crust
We all like having options.
Bubble, bubble, toil and trouble
Confirming hints picked up by the Hubble just a few years ago.
Shooting for the stars.
The ancient Lyrid meteors have never failed to amaze us.
A Gallery Of Photos Curated By The Person Who Made Most Of Them
Not just a pretty planet
The Saturn explorer's death spiral begins on Sunday
The story of heroic fasteners that will get us to the moon and back.
The plumes are stunning—and scientifically useful.
The next one isn't until 2033, so enjoy the pictures now
Two private citizens have reportedly paid up for a lunar jaunt