3. RGB 3 images
502nm 656nm 673nm
H-alpha SIIOIII

5. Origin of the lines
• These lines are the result of
atoms jumping from one state
to another
• Different atoms have different
spectral signatures
• Observation of a line can tell
us exactly what atom is
responsible.
• Dark lines are the result of
atoms absorbing light, and
bright lines are due to atoms
emitting light.

8. Pillars of
Creation
創造之柱
Evaporating Gaseous Globules,
EGGs 星蛋
Credit: NASA, ESA, STScI, J. Hester and P. Scowen (Arizona State University)

9. Credit: T.A.Rector, B.A.Wolpa, J. Hester, P. Scowen, NASA, ESA, and The Hubble Heritage Team (STScI/AURA), STScI.
M16 Eagle Nebula 鷹狀星雲

10. Credit: www.genesis16.net
CCD – Charged Couple Device

11. Credit: Molecular Expressions, Florida State University

12. Credit: Molecular Expressions, Florida State University

13. Credit: Molecular Expressions, Florida State University

14. Credit: Molecular Expressions, Florida State University

15. Credit: Molecular Expressions, Florida State University

16. Credit: Molecular Expressions, Florida State University

17. Credit: Sky & Telescope

18. Aperture Photometry