One of them provided the key to our understanding of the substance of the stars and another devised a way for us to calculate the size of the universe. for some reason, you’ve probably never heard of them- wonder why...
annie jump cannon - @themarleematlin
cecelia payne - @kirstendunst
Today would be charles darwin's 209th birthday.
this is evolution by natural selection, the most revolutionary concept in the history of science. darwin first presented the evidence for this idea in 1859. the uproar it caused has never subsided. #cosmos#darwinday
"the sky calls to us..." carl sagan, cosmos, 1980 #repost @nasa
super soon...there will be a #supermoon! just before dawn on jan. 31 a lunar trifecta – the super blue blood moon – will be visible in the sky. this full moon is the third in a series of “supermoons,” which is when the full moon is at or near its closest point to earth in its orbit.
it will also be the second full moon of the month, commonly known as a “blue moon.” the super blue moon will pass through earth’s shadow to give viewers in the right location a total lunar eclipse. while the moon is in the earth’s shadow it will take on a reddish tint, known as a “blood moon.” make sure you get outside to experience this lunar event for yourself! weather permitting, the west coast, alaska and hawaii will have a spectacular view of totality from start to finish (swipe to see the map). unfortunately, eclipse viewing will be more challenging in the eastern time zone. the eclipse begins at 5:51 am et, as the moon is about to set in the western sky, and the sky is getting lighter in the east.
"modern science has been a voyage into the unknown, with a lesson in humility waiting at every stop. many passengers would rather have stayed home." carl sagan, pale blue dot, 1994 #cosmospossibleworlds
"i know of a world with a million moons. i know of a sun the size of the earth — and made of diamond...there are stars leaving the milky way, and immense gas clouds falling into it. there are turbulent plasmas writhing with x- and gamma-rays and mighty stellar explosions. there are, perhaps, places which are outside our universe. the universe is vast and awesome, and for the first time we are becoming a part of it." -carl sagan, the cosmic connection, 1973
"we on earth have just awakened to the great oceans of space and time from which we have emerged. we are the legacy of 15 billion years of cosmic evolution." carl sagan, ann druyan, steven soter
cosmos: a personal voyage, 1980