The Sun is covered in dark patches bigger than Earth. A powerful flare has already erupted, with more likely coming.

A geomagnetic superstorm is an extreme space weather event that occurs when the sun releases massive amounts of energy and ...

Astronomers spotted a potential Earth-size rocky world orbiting a white dwarf, suggesting a future in which our planet outlives its star. By Jonathan O’Callaghan In six billion years the sun will ...

Scientists using a NASA space telescope have discovered a tantalizing world. It's about the size of Earth, sits remarkably close to our solar system, and could be comfortable for life as we know it.

Earth's orbit is an ellipse, not a perfect circle. Earth's distance from the Sun varies by about 3 million miles throughout the year. Earth's orbit's semimajor axis is approximately 93 million miles.

A sunspot, potentially generating multiple solar flares, may lead to auroras that could be visible as far south as Alabama.

Last month's total solar eclipse isn't your only chance to take a peep at the sun this year. The European Science Agency released a hot new video of the sun's corona, which is the upper layer of the ...

Apollo samples provide evidence: Researchers analyzed Moon rocks brought back by the Apollo missions and, for the first time, ...

The exoplanet Gliese 12 b is tantalizingly close and moderately warm, situated just 40 light-years away around a red dwarf star. The potentially habitable planet could be a good place to search for ...