coronal mass ejection

American  

noun

Astronomy.

1. a large-scale solar event involving an ejection of hot plasma that may accelerate charged particles and travel as far as the earth's orbit, preceded by a shock front that may create a magnetic storm on earth. CME

---

coronal mass ejection British  

noun

1. a cloud of particles ejected from the sun's surface during a solar flare

---

coronal mass ejection Scientific  

/ kôr′ə-nəl,kŏr′-,kə-rō′nəl /

1. A massive, bubble-shaped burst of plasma expanding outward from the Sun's corona, in which large amounts of superheated particles are emitted at nearly the speed of light. The emissions can cause disturbances in the solar wind that disrupt satellites and create powerful magnetic storms on Earth. They were first observed in the early 1970s, when photographs taken from satellites revealed coronal activity that could not be seen in images taken from Earth.

---

Example Sentences

Prof Ramesh says that if we are able to see what happens on the Sun's corona and spot a solar storm or a coronal mass ejection in real time, record its temperature at origin and watch its trajectory, it can work as a forewarning to switch off power grids and satellites and move them out of harm's way.

From BBC

Image:This artist’s impression shows a coronal mass ejection, or CME, around a nearby star.

From Space Scoop

Dahl said that another blast of solar material, known as a coronal mass ejection, is forecast to arrive in the United States midday Wednesday.

From Los Angeles Times

The heightened chance of a UK sighting has been caused by a fast-moving coronal mass ejection, which is a "release of plasma and magnetic field from the Sun's corona", late on Saturday night.

From BBC

Having the extra energy of an Earth-directed Coronal Mass Ejection and geomagnetic storm will increase chances even more.

From BBC