Earth's magnetic field protects us from the radiation that exists naturally in space. Mars does not have that shield.
Despite the overall decline, history has proven that some of the largest solar storms in memory can occur when sunspots appear to be ebbing.
What happens if a cruise ship carrying 1,000 people loses communication and GPS capabilities in the Arctic Ocean?
Legislation introduced in the Senate last week is the best effort yet put forward by Congress to improve space weather forecasts.
True to its form, the sunspot has proven to be a gentle giant.
The sunspot region dwarfs the size of the Earth by many multiples
Forecasters were only expecting a minor geomagnetic storm, but the solar wind came in hot and fast Sunday night.
Why space weather won't go away.
Sun cycles have been documented for nearly 300 years. The current cycle reached its maximum just last year.
The wake of the sun's coronal mass ejection contained an essential ingredient for geomagnetic storming.