The true radiation risk from commercial flying has nothing to do with security scans. A radiation expert explains how much cancer risk the most frequent of flyers take on when they take to the skies.
As technology advances, tiny satellites no bigger than a loaf of bread have advanced from just proving they work to being big contributors in answering science questions.
Ruby and sapphire clouds may be hovering over exoplanet HAT-P-7b.
Here's how to tell airglow from northern lights.
A leading NASA scientist has asked CSIRO to stay in its global network that monitors atmospheric dust and pollution. The data are vital to understand the effects on weather and climate.
Hunting for meteorites in the vast Pilbara is hard work, but even a tiny speck can tell us a great deal about the sky billions of years ago.
Ice cores tell us vital information about how the world's climate has changed - and how it will change in the future.
Was it a UFO? Was it a high-tech plane? Here's what lucky people really saw over Scotland on February 29.