The number of planets that orbit the sun depends on what you mean by “planet,” and that’s not so easy to define ...

Despite common assumptions, the disk of our Solar System is warped, and the planets travel around the Sun in slightly eccentric (or oblong) orbits. Scientists now think that a mysterious object ...

Images captured by NASA's Solar Dynamics Observatory have revealed that "coronal loops" give off subtle flashes of ...

If our solar system were to lose a few moons or even a planet, the difference might be hard to notice—but lose the sun, and everything changes. Despite its role as neighborhood linchpin ...

"By studying the sun up close, we can better understand its impacts throughout our solar system, including on the technology we use daily on Earth, as well as learn about the workings of stars across ...

which could act as an early warning system for dangerous space weather. Shining loops of plasma on the surface of the sun "flicker" hours before they unleash potentially dangerous solar flares ...