from The American Heritage® Dictionary of the English Language, 4th Edition
- n. The area in which the outgoing solar wind and the incoming plasma from interstellar space meet. It is the boundary of our solar system.
from Wiktionary, Creative Commons Attribution/Share-Alike License
- n. The boundary of heliosphere where the Sun's solar wind is stopped by the interstellar medium.
from WordNet 3.0 Copyright 2006 by Princeton University. All rights reserved.
- n. the boundary marking the edge of the sun's influence; the boundary (roughly 100 AU from the sun) between the interplanetary medium and the interstellar medium; where the solar wind from the sun and the radiation from other stars meet
Sorry, no etymologies found.