Reflection nebula

Thus, the frequency spectrum shown by reflection nebulae is similar to that of the illuminating stars.

The latter two are often aligned with the galactic magnetic field and cause the scattered light to be slightly polarized.

The supergiant star Antares, which is very red (spectral class M1), is surrounded by a large, yellow reflection nebula.

In 1922, Edwin Hubble published the result of his investigations on bright nebulae.

One part of this work is the Hubble luminosity law for reflection nebulae, which makes a relationship between the angular size (R) of the nebula and the apparent magnitude (m) of the associated star: where k is a constant that depends on the sensitivity of the measurement.

The Witch Head reflection nebula (IC2118), about 900 light years from Earth, is associated with the bright star Rigel in the constellation Orion . The nebula glows primarily by light reflected from Rigel, located just outside the top right corner of the image. Fine dust in the nebula reflects the light. The blue color is caused not only by Rigel's blue color but because the dust grains reflect blue light more efficiently than red.
Reflection nebula IC 2631 . [ 2 ]
Reflection nebula vdB1
Cosmic dust clouds in Messier 78 . [ 6 ]