heber curtis discovered the center of the milky way galaxy.
who discovered the center of the milky way galaxy?
heber curtis
immanuel kant stated in "general natural history and theory of the heavens" (1755) that a large star was at the center of the milky way galaxy, and that sirius might be the star. harlow shapley stated in 1918 that the halo of globular clusters surrounding the milky way seemed to be centered on the star swarms in the constellation of sagittarius, but the dark molecular clouds in the area blocked the view for optical astronomy. in the early 1940s walter baade at mount wilson observatory took advantage of wartime blackout conditions in nearby los angeles to conduct a search for the center with the hooker telescope. he found that near the star alnasl (gamma sagittarii) there is a one-degree-wide void in the interstellar dust lanes, which provides a relatively clear view of the swarms of stars around the nucleus of our milky way galaxy. this gap has been known as baade's window ever since.
galactic center
bullet::::1. sentient races actually very rarely develop, such that only humans evolved in the milky way galaxy, and in most "other" galaxies, it appears probable (given this assumption) that only one sentient race would develop. however, statistically two or more alien races might evolve in the same galaxy, leading them into inevitable conflict. the fighting in this other galaxy would only end when one race emerged the victor, and after the prolonged conflict with other races, would have developed an aggressive and expansionist mindset. in contrast, humans had never encountered another sentient species in the milky way galaxy, so they never felt greatly compelled to expand to other galaxies, but instead to fight other humans over control of the milky way. eventually, such an aggressive alien race would expand from galaxy to galaxy, and try to invade the milky way galaxy.
psychohistory (fictional)