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Watch Spectral | Netflix Official Site. When an otherworldly force wreaks havoc on a war-torn European city, an engineer teams up with an elite Special Ops unit to stop it. Watch trailers & learn more.
A sci-fi/thriller story centered on a special-ops team that is dispatched to fight supernatural beings.
- 2 min
Each star is assigned a spectral type based on the appearance of its spectrum. Stellar classes typically have three elements: a letter (O-B-A-F-G-K-M), an Arabic number between 0 and 9, and a Roman number between I and VII (or a zero). The letter indicates the spectral class, which is determined based on the star’s effective temperature.
SPECTRAL definition: 1. coming from or seeming to be the spirit of a dead person: 2. of the set of colours into which a…. Learn more.
The standard spectral class classification scheme is thus based on temperature. Most stars fit into one of the following types or spectral classes: O, B, A, F, G, K, M. These classes go from hot to cool with O the hottest and M, cool. recent discoveries have led to tentative new classifications for even cooler L-class stars.
This spectral atlas contains a sample of the standard spectral type stars, peculiar stars, variable stars, and some special stars. The atlas is divided into pages for each spectral type, with each page containing a short description of the stellar type, characteristic spectral features, and a brief physical explantaion.
Stars can be classified by their surface temperatures as determined from Wien's Displacement Law, but this poses practical difficulties for distant stars. Spectral characteristics offer a way to classify stars which gives information about temperature in a different way - particular absorption lines can be observed only for a certain range of ...
