Solar System
Is Everything in the Universe Expanding?
The Universe is expanding. Distant galaxies are moving away from us in all directions. It’s natural to wonder, is everything…
Where Should We Look for Life in the Solar System?
Emily Lakdawalla is the senior editor and planetary evangelist for the Planetary Society. She's also one of the most knowledgeable…
The Day the Earth Smiled: Saturn Shines in this Amazing Image from the Cassini Team
This summer, for the first time ever, the world was informed that its picture was going to be taken from…
Russia’s Second Shot at Phobos May Return Bits of Mars As Well
After the tragic failure of the first Phobos-Grunt mission to even make it out of low-Earth orbit, the Russian space…
Astronomy Cast 321: Solar Flares
Sometimes the Sun is quiet, and other times the Sun gets downright unruly. During the peak of its 11-year cycle,…
Fly Across Mercury with MESSENGER!
Take a ride on the Mercury express and see what MESSENGER sees in these two new videos! Each made from…
Do You Need Some Space?
Of course you do! (Who doesn't?) And so here's a wonderful tour of our Solar System to provide you with…
Here’s the Latest Kepler Orrery Video: the Orbits of the Planets Go ‘Round and ‘Round
If you've ever wanted to know what 3,538 exoplanets look like spinning around their stars, here you go! This is…
What is the Milky Way?
When you look up at the night sky, assuming conditions are just right, you might just catch a glimpse of…
The Eerie Music of Interstellar Space
While it's true that there's no air to carry sound in space, starship explosions would be strangely silent and no…