1. Stardust and its Movement
in Space
By Zoe Zontos

3. Content Preview
1. Introduction to stardust
2. Contributing factors
3. Dust-driven stellar winds
4. Testing methods
5. Dust grain measurement data
6. Conclusion
7. References

4. Stardust from Stellar Aging/Deaths Reveals
Connections to the Origins of Life
Makeup of stardust
Importance of stardust and movement through space

5. Certain Factors Contribute to the Creation
and Movement of Stardust
Supernovae
Stellar Winds
Contributing Variables that Drive Gas away
- Surface temperature, mass, luminosity, chemical composition, magnetic field

6. Dust Driven Stellar Winds Push Stardust into
Space
Gas masses are pushed
outward by dust
Grains are formed near
the star to trigger outflow
- Made of abundant materials
with radiative cross sections
Silicates lacking in iron are said to
increase photon scattering over
- Provide radiative
acceleration needed for winds

7. Specific Testing Methods Yield Different
Results
To test, size and composition of
dust grains measured in vicinity of host star
Polarization methods
Silicate particles 600 nm in diameter
from vicinity of cool, giant stars

8. Grain Size Measurements Reveal Ideal Grain
Radius of Around 300 nm

9. What Does this all Mean?
The role of aging stars in the cosmic-matter cycle
The origins of stardust and the chemical evolution of the cosmos

10. References
Hofner, Susanne. "Fresh Light on Stardust." Nature 484 (2012): 172-73.
Web. 13 Nov. 2015.
Norris, Barnaby M.R., et al. "A Close Halo of Large Transparent Grains
around Extreme Red Giant Stars." Nature 484 (2012): 220-22.
Web. 13. Nov. 2015.
"We Are All Stardust." Web log post. Clastic Times. N.p., 17 Jan. 2014.
Web. 14 Nov. 2015.