|
A nebula that absorbs starlight. Unlike emission or reflection nebulae, absorption
nebulae cannot normally be seen in visible light, unless they appear against a bright
background like the Horsehead or Keyhole Nebulae.
 |  |
|
An absorption nebula is a dense cloud of dust and gas. From the point of view
of an observer on Earth, it absorbs the light from more distant stars, creating a
dark, starless region.
|
|
|