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NGC 6302: The Butterfly Nebula

The bright clusters and nebulae of planet Earth’s night sky are often named for flowers or insects. Though its wingspan covers over 3 light-years, NGC 6302 is no exception. With an estimated surface temperature of about 250,000 degrees C, the dying central star of this particular planetary nebula has become exceptionally hot, shining brightly in ultraviolet light but hidden from direct view by a dense torus of dust.



Take the impossible “literacy” test for black voters in the 60’s (3 pictures)

A “literacy test” refers to the government practice of testing the literacy of potential citizens at the federal level, and potential voters at the state level. The federal government first employed literacy tests as part of the immigration process in 1917. Southern state legislatures employed literacy tests as part of the voter registration process as early as the late 19th century.