Disturbed Universe

amateur astronomerJason Ware上有很多Galaxy圖片

http://www.astronomynotes.com/ismnotes/s8.htm winding problem http://www-astro.physics.uiowa.edu/~ri/modern_spr01/lect28/lect28.html Density Jam Knot

1. M51 Spiral Galaxy
2. Super Nova 1994I
3. NGC 4622
4. NGC 4622
5. Cool Cosmos
6. Density Wave Sim

http://www.astronomynotes.com/ismnotes/s8.htm http://www.nrao.edu/pr/2004/m51co/ http://www-astronomy.mps.ohio-state.edu/~pogge/Ast162/Unit4/spirals.html http://www.science.gmu.edu/~tle/Classes/Csi_801/Project/Discussion/node3.html http://encyclopedia.laborlawtalk.com/Galaxy http://encyclopedia.laborlawtalk.com/Hubble_sequence spiral 分類 http://cosmos.swin.edu.au/entries/hiiregion/hiiregion.html H-II Region http://casa.colorado.edu/~danforth/science/spiral/ http://ircamera.as.arizona.edu/astr_250/Lectures/Lecture_23.htm --- 寫得很好的文章 http://bustard.phys.nd.edu/PH308/galaxies/spiral.html winding dilemma