Engaging articles, breathtaking images and expert knowledge Issues delivered straight to your door ...

NASA's Advanced Composite Solar Sail System (ACS3) will be visible from the ground. Find out when you can see it on the NASA app on a mobile device. Credit: NASA/JPL-Caltech ...

You won't see a majestic line of planets on Jan. 25 the way people on social media are promising, but you will see four bright planets if you look up.

Earth" and a massive outer planet, revealing insights into extreme planetary evolution. An international research team, led ...