Geography · Astronomy and Nebulae
On what primary factor does the luminosity and visibility of an astronomical nebula depend?
- 1The velocity of cosmic microwave background radiation passing through it
- 2The gravitational interaction with the nearest event horizon
- 3The absolute chemical density of heavy metals in it
- 4The presence of stars embedded within or originated from it✓
Correct answer
The presence of stars embedded within or originated from it
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