Earth
What Are These Mysterious Green Lights Photographed From the Space Station?
"Bangkok is the bright city. The green lights outside the city? No idea…" This was the description accompanying the photo above, perplexingly Tweeted…
How Do The Tides Work?
Anyone who lives close to ocean is familiar with the tides. And you probably know they have something to do…
Cool Infographic Compares the Chemistry of Planetary Atmospheres
Here on Earth we enjoy the nitrogen-oxygen atmosphere we've all come to know and love with each of the approximately 24,000…
How Can We Move the Earth?
Sooner or later we're going to want to move the Earth further away from the Sun. It turns out, there…
Why is Everything Spherical?
Have you ever noticed that everything in space is a sphere? The Sun, the Earth, the Moon and the other…
The Place Where Earth from Space Looks Like a Floating Piece of Cardboard
As we've noted before, astronaut Reid Wiseman is sending out a bevy of tweets and pictures from his perch on…
Watch the Rise and Fall of a Towering Inferno on the Sun
Caught on camera by NASA's Solar Dynamics Observatory, a prominence blazes hundreds of thousands of miles out from the Sun's surface (i.e.,…
Why is the Moon Leaving Us?
Goodbye Moon. Every year, the Moon slips a few centimeters away from us, slowing down our day. Why is the…
Stunning Snapshots from Space Courtesy of Reid Wiseman
On May 28 the crew of Expedition 40/41 launched from Baikonur Cosmodrome, their Soyuz TMA-13M arriving at the International Space Station…
Selfies from Around the World Combine to Make a Portrait of Earth
On Earth Day, April 22, NASA invited people around the world to share their "selfies" on social media sites like…