Spectral class

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The subject of this article is from the NEXT update.
The information from this article is up-to-date as of 28 October, 2018.
NmsMisc SpectralClass.png

Spectral class is used as a method of categorizing stars.

Summary[edit | edit source]

All stars are assigned a spectral class, generally composed of three coded characters. For example, the pre-release star Ethaedair is listed with a spectral class of G2m. This indicates that it is one of the hotter yellow stars, and with enhanced metals.

In No Man's Sky, the colour of the star provides information ahead of time as to what life, resources, and other materials are likely to be found on the planets circling the particular star. In fact, some resources are found only in star systems of certain colours. (example: Indium is found only in blue star systems, classes O and B)

Releases[edit | edit source]

In the initial Atlas Rises release, Spectral Class was removed from the game. It was restored to the galaxy map text as part of the 1.38 update.

Values[edit | edit source]

The following information is based on the stars in the Terran universe, but should give an idea of what may be seen in the game. Note that the Terran sun ranks as a G2V.

Class[edit | edit source]

Spectral types.jpg

The first character is the star's class (listing Class, Temperature and Colour):

CLASS TEMPERATURE COLOUR CLASS
O    ≥ 30,000 K blue Blue
B    10,000-30,000 K blue-white Blue
A    7,500-10,000 K white
F    6,000-7,500 K yellow-white Yellow
G    5,200-6,000 K yellow Yellow
K    3,700-5,200 K orange Red
M    2,400-3,700 K red Red
L    1,300-2,400 K red-brown
T    500-1,300 K brown
Y    ≤ 500 K dark brown
E    unknown green Green

(Note: The Green Star Class does not exist in the Terran universe, but does in the NMS universe)

Relative Temperature[edit | edit source]

The second character provides a heat range within a specific class, where the lower the number, the hotter the star. For example, a star rated G3 would represent a warmer temperature than G8.

Oddities[edit | edit source]

The third character indicates any oddities for the star. Note that entries referring to spectral lines or specific elements such as hydrogen would be distinctly different in the universe of No Man's Sky.

e = Emission lines present
f = N III and He II emission
h = WR stars with emission lines due to hydrogen
k = Spectra with interstellar absorption features
m = Enhanced metal features
n = Broad ("nebulous") absorption due to spinning
p = Unspecified peculiarity
q = Red & blue shifts line present
s = Narrowly "sharp" absorption lines
v = Variable spectral feature
w = Weak lines

External links[edit | edit source]