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Astronomers trawling through a mess of stellar data discover that Tau Ceti, our nearest single Sun-like star, hosts five planets - one in its "habitable zone".

A glimpse beyond our solar system reveals the neighborhood just outside the sun's influence is different and stranger than expected, scientists reported Tuesday....

Larger than expected variations in the Sun's ultraviolet output can explain weather patterns in recent northern hemisphere winters, including the UK's cold spells, scientists conclude.

Warming up on its solar cycle, the sun uncorked a a strong solar storm that reached Earth on Monday, federal scientists said, posing a threat to satellites and radio communications, although no interruptions had been reported to date.

A rare sun-like star that is both young and relatively close to Earth has been found to be harboring an even weirder object - a failed star locked in a close orbit around its host, according to a new study.

The calmest sun in a century may rustle up more hurricanes in the season that officially began Tuesday.

Astronomers announced this week they found a water-rich and relatively nearby planet that's similar in size to Earth.

Scientists in California say they're trying to replicate the power of the sun by firing laser beams at a tiny pellet of hydrogen. Physicists at the National Ignition Facility in Livermore say the nuclear fusion experiments may offer the world a clean source of energy, The Times of London reported Sunday. The hydrogen pellet will be hit with 192...