Jupiter and Mars will appear to make ultraclose approaches to the moon on two nights this week. Here's how to get the best ...

People's ability to interpret emotions or focus on performing a task is reduced by short-term exposure to particulate matter (PM) air pollution, potentially making everyday activities, such as the ...

As someone who lives near the city, light pollution limits what I see when I look up at night. However, that doesn't mean I ...

Chile's pristine, dark desert skies, world-renowned for astronomy, are at risk of being outshined by urban and industrial ...

Auroras have long mystified humanity. Now that we know what they are and why they happen, we can better predict how best to ...