Stars are classified by astronomers using the Morgan-Keenan spectral classification system, which groups stars by their temperature, color, and luminosity. The main sequence classes from hottest to coolest are O, B, A, F, G, K, and M - Remembered by the mnemonic 'Oh Be A Fine Girl, Kiss Me.' Our Sun is a G-type main-sequence star. O and B stars are hot, blue, and massive but short-lived. K and M stars are cooler red stars that are incredibly long-lived and abundant. Beyond main sequence, there are giant and supergiant classes. In this sortable quiz, you'll classify famous stars and star types into their correct stellar classification categories.
6 categories Science 6 plays
Click an item, then click a category bucket to sort it.
💡How to play: Click an item from the pool on the left, then click the category bucket on the right. When every item is sorted, hit Submit Sorting.