Space weather isn’t referring to rain clouds that float through the galaxy. Instead, it’s caused by massive explosions of particles that shoot out from the Sun.

The sun is in its most active phase—solar summer—causing auroras and posing real risks to satellites, GPS, and power systems on Earth.

The three spacecraft will be forecasting solar storms, mapping our solar neighborhood and observing the outer layer of Earth’s atmosphere.

After weeks of reduced activity, the sun erupted with three powerful flares on a single day. That could send solar flares toward Earth, impacting electronics and making it possible to view the ...

"The planet gets in the way from the point of view of any one spacecraft, so we had to spread them around the planet to look everywhere all at once." On Wednesday (Aug. 13), NASA announced that the ...