Every little bit counts.
The story of heroic fasteners that will get us to the moon and back.
An old theory gets a new assist from the sun.
What this new research means for radio astronomy
Our planet's personal space heater is incredibly efficient.
The early solar system was a wild, world-destroying place.
Also in space: A neighborhood of black holes, a new (and old) reason to study Venus' clouds, and the end of the Lunar XPrize.
It's time to return to our hellish neighbor.
In the December 1980 issue of Popular Science, a 38-year-old theoretical physicist answers the ultimate question about the universe.
It doesn't take much to enjoy nature's fireworks.
It's amazing what centuries of data can do.
Even partial eclipses can be exciting.
Excerpt: Mask of the Sun
The answer was blowing in the solar wind.
The top 7 explanations for the star's weird behavior, ranked roughly in order of plausibility
Till mid-February, early risers will see the first five-planet alignment in a decade
There's something weird happening around a faraway star.
Unraveling the mysterious electrical currents of the aurora borealis
Twinkle, twinkle, little star, how I wonder where you went
Europe's previous failed lander went missing for over a decade
So hot right now.
The Gaia satellite charts stars like never before.
The ancient Lyrid meteors have never failed to amaze us.
Future astronauts may depend on it, and a new forecast is about to be put to the test