Read more: Astronomers found a 'cold super-Earth' less than 6 light-years away — and it may be the first rocky planet we'll photograph beyond the solar system To depict the speed limit of the ...

During the time it takes for its wave to go through one cycle, a gamma-ray wave traveling at the speed of light will travel ... in violent explosions. On Earth, they originate from the decay ...

If our star suddenly enters a more active period, it can cause geomagnetic storms that knock out satellites or cause blackouts on Earth ... create a simple traffic light system based on predictions.