An image of Saturn taken by the Cassini spacecraft in 2006.
Beyond the rings of Saturn, our earth can be seen as a blob.

"When the Wright brothers built the spacecraft, no one thought it would be a normal mode of travel. But in just two decades, the situation has changed. Today, air travel is possible for anyone. One day Mars will be like...

A world of rocks and oceans made of lava. It sounds like some weird fantasy, but it's true. Scientists have now discovered such a hellish planet. They named the planet K2-141b. On a fiery hot planet hundreds of light-years away,...