vega is the bayer designation of the brightest star in the constellation lyra.
vega is the bayer designation of the brightest star in the constellation lyra.
bayer designation of the brightest star in the constellation lyra?
vega
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vega is the brightest star in the northern constellation of lyra. it has the bayer designation α lyrae, which is latinised to alpha lyrae and abbreviated alpha lyr or α lyr. this star is relatively close at only 25 light-years from the sun, and, together with arcturus and sirius, one of the most luminous stars in the sun's neighborhood. it is the fifth-brightest star in the night sky, and the second-brightest star in the northern celestial hemisphere, after arcturus.
vega
in most constellations, bayer assigned greek and latin letters to stars within a constellation in rough order of apparent brightness, from brightest to dimmest. since the brightest star in a majority of constellations is designated alpha (α), many people wrongly assume that bayer meant to order the stars exclusively by brightness. in bayer's day, however, stellar brightness could not be measured precisely. stars were traditionally assigned to one of six magnitude classes (the brightest to first magnitude, the dimmest to sixth), and bayer typically ordered stars within a constellation by class: all the first-magnitude stars, followed by all the second-magnitude stars, and so on. within each magnitude class, bayer made no attempt to arrange stars by relative brightness. as a result, the brightest star in each class did not always get listed first in bayer's order.
bayer designation