a shift toward shorter wavelengths of the spectral lines of a celestial object, caused by the motion of the object toward the observer.
a shift in the spectral lines of a stellar spectrum towards the blue end of the visible region relative to the wavelengths of these lines in the terrestrial spectrum: a result of the Doppler effect caused by stars approaching the solar system Compare redshift
fanciful; impractical: blue-sky ideas. (especially of securities) having dubious value; not financially sound: a blue-sky stock. Contemporary Examples Handcuffs, Ropes, and an Open Window: How I Escaped an Unthinkable Childhood Genyfer Spark January 28, 2012 Choking Back Tears, Thousands of Cops Honor Fallen Officer Ramos Michael Daly December 27, 2014 The Ballad of Johnny France […]
a law regulating the sale of securities, real estate, etc., especially such a law designed to prevent the promotion of fraudulent stocks.
blue sky software
a grayish, hairy, eastern Asian shrub, Caryopteris incana, of the verbena family, having clusters of showy, blue or bluish-purple flowers.