Unformatted text preview: a
neutral plasma (equal
number of electrons and
protons) expanding into
space at a high velocity. • Sun’s magnetic field is
embedded in this
plasma. 21 Where does the solar wind stop? • Other stars have winds too, called stellar
• Hence, interstellar space is not really a
• Tenuous magnetized plasma (and a little dust)
known as the local interstellar medium (LISM)
fills interstellar space.
• But “near” to our sun, the solar wind
dominates over the LISM.
• This bubble where the solar wind dominates is
known as the heliosphere
22 Where is our solar system? Speed ~ 220 km/s Transit >me ~ 225- 250 million years Light years The boundary between the solar wind and interstellar medium The tw...
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- Fall '08
- CMEs, coronal mass ejections