solar wind

from The American Heritage® Dictionary of the English Language, 5th Edition.

• noun A stream of high-speed, ionized particles ejected primarily from the sun's corona.

from Wiktionary, Creative Commons Attribution/Share-Alike License.

• noun astronomy The outflow of charged particles from the solar corona into space. Because of the high temperature of the particles of the corona, they are moving at speeds higher than the solar escape velocity.

from WordNet 3.0 Copyright 2006 by Princeton University. All rights reserved.

• noun a stream of protons moving radially from the sun