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Stellar classification: Quiz


Question 1: L does not mean lithium dwarf; a large fraction of these stars do not have ________ in their spectra.

Question 2: Their atmosphere is cool enough to allow metal hydrides and ________ to be prominent in their spectra.
Noble gasHalogenAlkali metalHydrogen

Question 3: Some K stars are giants and supergiants, such as Arcturus, while orange dwarfs, like ________ B, are main sequence stars.
Theta CentauriEta CentauriGamma CentauriAlpha Centauri

Question 4: It used a scheme in which the previously used ________ (I to IV) were divided into more specific classes, given letters from A to N.
Stellar classificationSupernovaBrown dwarfStar

Question 5: In 1868, he discovered ________, which he put into a distinct group:[4]
MetallicitySupernovaStellar classificationCarbon star

Question 6: Class G stars are probably the best known, if only for the reason that our ________ is of this class.
JupiterSunSolar SystemEarth

Question 7: For example our ________ has the spectral type G2V, which might be interpreted as "a 'yellow' two tenths towards 'orange' main sequence star".
JupiterSunSolar SystemEarth

Question 8: The spectral classes O through M are subdivided by ________ (0–9).
Arabic numeralsEastern Arabic numeralsAbjad numeralsArabic language

Question 9: This included both red dwarfs and ________ which are very faint in the visual spectrum.
Brown dwarfStellar classificationSupernovaStar

Question 10: Class O stars are very hot and very luminous, being bluish in color; in fact, most of their output is in the ________ range.
Electromagnetic spectrumX-rayUltravioletVisible spectrum


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