1. The Dynamic Sun Lecture 10

2. The Dynamic Sun
Solar rotation with sunspots
CME eruption
Rotating Sun in X-rays
Dynamics of coronal loops

3. Solar Events of Last October and November
“The Day the Sun Went Wild”: Largest Flares Since the Space Age

4. The Flare of November 4, 2003
If directed at Earth, would have damaged system of geosynchronous satellites. Radiation would have killed astronauts in interplanetary space

5. “e quindi uscimmo a riveder le stelle” Last words of Dante’s Inferno
The Stars
“e quindi uscimmo a riveder le stelle”
Last words of Dante’s Inferno

6. The Stars are other Suns
Or…the Sun is the closest star

7. Basic Questions about Stars
How far away are they?
How hot are they?
How massive are they
What are they made of?
Do they have planets too?
16 Cygni

8. Most Basic Method of Stellar Distance Determination
Trigonometric parallax: an ordinary surveying technique
Figure 16.1 of textbook
DEMO

9. Next time:
How far away are the stars (compared to solar system distances)?
What units do we use to describe their distances?