A NASA mission to observe the activity of the solar wind has returned its first images of giant coronal mass ejections (CMEs) ...

Sunspot region 4114 has unleashed its most powerful solar flare yet — an X1.9 class that erupted late June 19, triggering shortwave radio blackouts across the Pacific Ocean, including parts of Hawaii.

Mars and Regulus will remain close to each other until June 22. Now they are not so close to each other, but they can still be seen together with the naked eye. The best time to observe is right after ...

Summer officially begins in the Northern Hemisphere on June 20 with the summer solstice, the day with the greatest amount of ...

Our sun is classified as a G2 medium-sized star. We believe it’s about four billion, 600 million years old, halfway through its lifetime. It burns four million tons of hydrogen every second. The sun ...

Gravitational assists are an emblematic example of why space travel is hard —it is exactly rocket science, after all. Gravity ...

Could a passing star be on a collision course with our solar system and, eventually, Earth?It’s difficult to know if such an outcome is likely. Recently, researchers have found the Milky Way likely ...

Earth’s rotation reached record speed in 2025, shortening days by up to 1.63 ms. It could be about to happen again as Earth continues to spin more quickly.

Spurred by rising utility bills, St. Peter’s-San Pedro Episcopal Church in Salem, Mass., looked for alternatives. Its “Heaven ...

Summer arrives for northern observers as the Moon visits Venus, Uranus, and Mercury. Plus: globular cluster M15, double star ...

ESA’s Proba-3 mission has achieved a spacefaring marvel: two satellites flying in perfect formation to mimic total solar ...

Adventure seekers and travelers might argue that summer informally begins with the Memorial Day weekend. Then there's solar ...