A coronal mass ejection (CME) is a significant ejection of plasma mass from the Sun's corona into the heliosphere. CMEs are often associated with solar flares and other forms of solar activity, but a …

CMEs travel outward from the Sun at speeds ranging from slower than 250 kilometers per second (km/s) to as fast as near 3000 km/s. The fastest Earth-directed CMEs can reach our planet in as little as 15 …

Jan 10, 2026 · Coronal Mass Ejections can occur during solar flares unleashing a giant cloud of solar wind particles into space. Here you'll find an overview of the latest CMEs that where detected by the …

2 days ago · Auroras lit up high-latitude skies last night as Earth remained under the combined influence of a recent coronal mass ejection (CME) and a fast solar wind stream flowing from a large coronal hole.

Dec 19, 2025 · coronal mass ejection (CME), large eruption of magnetized plasma from the Sun ’s outer atmosphere, or corona, that propagates outward into interplanetary space. The CME is one of the …

Jun 12, 2025 · Explosions of charged particles from the Sun, known as Coronal Mass Ejections (CME), are being observed in more detail by a NASA mission helping scientists better predict space weather …

Dec 4, 2025 · CMEs are large expulsions of magnetized plasma from the Sun's corona, the outer layer of the solar atmosphere. Their formation is primarily driven by changes and interactions in the Sun's...

A coronagraph produces an artificial eclipse of the Sun by placing an "occulting disk" over the image of the Sun. During a natural eclipse of the Sun the corona is only visible for a few minutes at most, too …

4 days ago · A long-duration M3.3 flare erupted from just beyond the east-southeast limb at 11:00 UTC on January 11, 2026, as CME and coronal hole influences continued to disturb the solar wind …

Coronal Mass Ejections, or CMEs, are explosive bursts of solar plasma and magnetic field that fly away from the Sun at thousands of kilometers an hour. CMEs are frequently (but not always) associated …