What Makes a "cannibal coronal mass ejection (CME)". Bolton on Russian sanctions threat: Trump laying the groundwork to say ...

The Northern Lights may be visible in the U.S. overnight on Tuesday and Wednesday as a coronal mass ejection travels towards Earth to cause a geomagnetic storm.

Solar news: NOAA forecasts a geomagnetic storm alert and viewline map for Northern Lights sightings in the US for June 24-25.

The solar corona, mysteriously hotter than the surface beneath it, is central to understanding the solar wind and coronal mass ejections.