who first used rr lyrae variable stars to determine distances in our milky way galaxy
RR Lyrae variable In surveys of globular clusters, these "cluster-type" variables were being rapidly identified in the mid-1890s, especially by E. C. Pickering.
Hubble sequence Our own Milky Way is generally classed as SBb or SBc[14], making it a barred spiral with well-defined arms.
Galaxy In 1922, the Estonian astronomer Ernst Öpik gave a distance determination that supported the theory that the Andromeda Nebula is indeed a distant extra-galactic object.[43] Using the new 100 inch Mt. Wilson telescope, Edwin Hubble was able to resolve the outer parts of some spiral nebulae as collections of individual stars and identified some Cepheid variables, thus allowing him to estimate the distance to the nebulae: they were far too distant to be part of the Milky Way.[44] In 1936 Hubble produced a classification of galactic morphology that is used to this day.[45]
A Dog's Journey 2000's, California - Setting
Swallowing 5) Closure of the nasopharynx
Baahubali: The Beginning Baahubali: The Beginning (stylized as