This week, sky-watchers will have the opportunity to witness a rare planetary alignment as several planets line up in the ...

Scientists have found a new form of water, called "plastic ice VII," that could possibly exist on other planets. This unusual ...

Whenever planets are visible in the night sky, they always appear roughly along the same line. This path, known as the ...

Earth's Moon, the planet's only natural satellite ... In this article, I'll delve into the Moon's phases, including why they occur and how they impact life on Earth. The Sun always lights up ...

High-pressure experiments generated the first direct observation of plastic ice, which has qualities of both crystalline ice and liquid water.

On Feb. 28, the one-day-old moon will pass in front of Mercury for observers in Australia and the south Pacific, and on March 1 the moon will make a close pass to Venus.

The four planet-strong "planet parade" currently visible to the naked eye in the night sky for a short time after sunset will peak this weekend as Venus reaches its ...