| Term: | Solar Wind |
| Definition: |
The constant stream of solar coronal material that flows off the sun. The solar wind is much less dense than the wind on Earth -- indeed it can be 1000 times less dense than a man-made vacuum on Earth -- but it is much faster, typically moving at speeds of one to two million miles per hour. Indeed, it is constantly on the move: there is no place within the solar system where the solar wind's velocity is zero. |