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#OTD in 1977, Voyager 1 was launched on its way to Jupiter & Saturn. It has reached interstellar space in 2012. 📷 NASA
#OTD in 1972, Pioneer 10 was the first human-made space probe to enter the asteroid belt, located between the orbits of Mars and Jupiter.
Some of plant specimens collected by Ynes Mexia can be found digitized at the NYBG Steere Herbarium. https://t.co/KVviIXSnnG
#OTD in 1940, British entomologist and illustrator Margaret Fountaine died, with a butterfly net in her hands, from a heart attack in Trinidad. #WomenInSTEM
APOD "From Orion to the Southern Cross" 📷 Lucy Yunxi Hu https://t.co/bG5EWk4yQ2
#OTD in 1610, Galileo Galilei discovered 3 moons of Jupiter (Io, Europa & Ganymede), a week later the fourth moon (Callisto).
#OTD in 1858, English photographer William Usherwood became the first to successfully photograph a comet. The photograph of Donati's Comet has not survived. 📷 Painting of Donati's Comet
#OTD in 1977, Voyager 1 was launched on its way to Jupiter & Saturn. It has reached interstellar space in 2012. 📷 NASA
#OTD in 1885, Isaac Ward observed a supernova in the Andromeda galaxy, the only one seen in that galaxy so far. 📷 Andromada galaxy (right), NASA/JPL-Caltech
#OTD in 1972, Pioneer 10 was the first human-made space probe to enter the asteroid belt, located between the orbits of Mars and Jupiter.