space
A Volcanic View of Mercury
Here on Earth we're used to seeing volcanoes as towering mountains with steam-belching peaks or enormous fissures oozing lava. But…
A Mercurial Milestone: 1,000 Featured Images from MESSENGER!
It's been nearly two and a half years since the NASA-sponsored MESSENGER mission entered orbit around Mercury -- the first…
Supermassive Black Holes Keep Galaxies From Getting Bigger
It's long been a mystery for astronomers: why aren't galaxies bigger? What regulates their rates of star formation and keeps…
The Scariest Part of “Gravity” is the Lack Thereof
I love science fiction films and I especially love it when the "science" part leans closer to fact than fiction.…
Why “The Big Bang” Is a Terrible Name
Have a discussion about the origins of the Universe and, ere long, someone will inevitably use the term "the Big…
Voyager 1: Is It In or Is It Out?
Nearly 18.7 billion kilometers from Earth -- about 17 light-hours away -- NASA's Voyager 1 spacecraft is just about on…
What Is A Quasar?
I love it when scientists discover something unusual in nature. They have no idea what it is, and then over…
What Happens To Your Skin in Space
The microgravity environment of the ISS poses many challenges to the human body -- some more expected than others --…
How Can We Stop An Asteroid?
"It's like looking for a charcoal briquette in the dark," says Bill Nye the Science Guy in this new video…
How Many Moons Does Earth Have?
Look up into the night sky and count the moons. You can see only one moon, "the" Moon. But does…