Our universe- nebulae (Introduction)
http://blogs.scientificamerican.com/basic-space/2011/10/31/spooky-nebulae-ghosts-snakes...
Gorgeous pictures, thanks to Hubble
Complete thread:
- Our universe- nebulae -
David Turell,
2011-11-04, 00:52
- Our universe- Hubble tricks - David Turell, 2011-11-05, 17:14