Gas and Dust and Stellar Nurseries. M17 Omega or Swan Nebula In Sagittarius. optical. IR. emission lines. NOAO/AURA. Lagoon Nebula in Sagittarius. Eagle Nebula in Serpens. images from 0.9m telescope at KPNO. Pelican nebula. Great Nebula in Orion. 1 square light year with HST.
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0.9m telescope at KPNO
1 square light year with HST
nebula shows life cycle - Bok globules, gaseous pillars, young cluster
WD accretes from RG wind
Disk form around WD
WD undergoes nova
2nd nova explosion later