Polaris
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Polaris is a yellow supergiant star in the northern circumpolar constellation of Ursa Minor. It is designated α Ursae Minoris and is commonly called the North Star. With an apparent magnitude that flu
Polaris components as seen by the Hubble Space Telescope
A typical star trail photograph taken in the Northern Hemisphere, with Polaris in the center
Polaris azimuths vis clock face analogy.
Artist's conception showing supergiant Polaris Aa, dwarf Polaris Ab, and the distant dwarf companion Polaris B
Yellow supergiant
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A yellow supergiant is a star, generally of spectral type F or G, having a supergiant luminosity class. They are stars that have evolved away from the main sequence, expanding and becoming more lumino
Polaris
…it useful for navigation. Although appearing to the naked eye as a single point of light, Polaris is a triple star system, composed of the primary, a yellow supergiant designated Polaris Aa, in orbit with a smaller companion, Polaris Ab; the pair is almost certainly in a wider orbit with the third star, Polaris B. The…
The massive RSGC1 cluster contains 14 red supergiants and one yellow supergiant.
Light curve of Delta Cephei, a yellow supergiant classical Cepheid variable