At any given time, about two-thirds of Earth's surface is covered by clouds. Overall, they make the planet much cooler than ...

Because the Hijri calendar is lunar, the dates of Islamic months and holidays — such as Ramadan and Eid al-Fitr — change annually. The new year corresponds with the first sighting of the crescent moon ...

The innermost planet of our solar system is now well placed for observers.

Experts warned that worldwide efforts to contain the spread of nuclear weapons by peaceful means would be at stake in the ...

How long does it take Pluto to orbit the sun? Learn more about how this planet makes one lap around our Solar System.

Wausau Pilot & Review Central Wisconsin skywatchers can look forward to a dynamic week of celestial events, from the official ...

Each day, around 48.5 tons (44,000 kilograms) of ancient debris dating back to the creation of our solar system collide with ...

Radar and gravity records from NASA’s Magellan orbiter show that Venus' surface is still shifting and is not geologically ...

There will be three full moons during the summer. And the sky this season has a number of bright stars that form easily ...

Climate scientist Kate Marvel talks to The Washington Post about the complicated mix of emotions people might feel about the ...

Peak sunshine has arrived in the Northern Hemisphere — the summer solstice. Friday was the longest day of the year north of ...

As the closest planet to the Sun, Mercury is exposed to the star's enormous gravitational field. And it's really stressful.