asking at each place how long its light takes to reach us here on Earth. The closest object to us is the Moon. Its average distance is about 240,000 miles, so light from the Moon takes (240,000 ...

Aurora Australis, a celestial spectacle usually reserved for Antarctica, could light up the skies from Cape Town to Limpopo.

A curious question sparked a cosmic deep dive into why light never tires—even after 25 million years on the move.

The National Oceanic and Atmospheric Administration’s Space Weather Prediction Center has issued a G4 (severe) geomagnetic ...

As light reaches Earth's atmosphere, it is scattered in all directions by gasses and particles in the air. Because blue light scatters relatively easily, that's why our sky appears in that color ...

This weekend, residents in the northernmost parts of Texas — particularly those in the Panhandle north of Amarillo — may be able to see the Northern Lights with the naked eye. A broader area, ...

A solar flare last week was so big it disrupted radio transmissions on Earth. Nasa said the burst of energy was the biggest ...

As light reaches Earth's atmosphere, it is scattered in all directions by gasses and particles in the air. Because blue light scatters relatively easily, that's why our sky appears in that color ...

Shooting stars will usher in Earth Day starting late Monday night as the Lyrid meteor shower reaches its peak ... Angeles and other major cities where light pollution is pervasive, stargazers ...