The sun has certainly woken up! It has fired off not one but two powerful X2.5 solar flares within just 7 hours.

For observers on Earth, the sun appears as a bright, familiar disk—but what we see is only half the story. Like the moon, one ...

The northern lights may be visible this weekend after a flurry of activity on the sun, with an X-class solar flare and ...

Add Yahoo as a preferred source to see more of our stories on Google. The sun shines above the Earth’s horizon. Perihelion, the point when Earth is closest to the Sun, occurs annually in early January ...

Across Earth, every night, thousands of automated stargazers are waiting to take pictures of shooting stars. I am one of the ...

Here's how to see Comet PanSTARRS in satellite images ahead of its close approach to Earth on April 26.

Add Yahoo as a preferred source to see more of our stories on Google. Study finds Earth-sun distance helps drive the Pacific cold tongue, a key player in El Niño and global weather. (CREDIT: Wikimedia ...

An eternal night seems like something out of a fairy tale, but it is an actual and regular event in certain areas around the ...

From Mars, Earth transits the Sun four times in a 284-year cycle. The transits occur in either May or November at intervals of 100.5, 79, 25.5, and 79 years. During these events, Earth and the Moon ...

A strip of cool water stretches west from South America along the equator, helping set the pace for some of the planet’s most important weather swings. That Pacific “cold tongue” helps steer the El ...