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BellaOnline Editor Modern Day Human
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. On this day in 1646 – August 19th – English astronomer John Flamsteed was born in Denby, Derbyshire.Flamsteed was the first Astronomer Royal at the Royal Observatory Greenwich, and his star atlas was the standard for a nearly a century..
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BellaOnline Editor Modern Day Human
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On this day in 1891 – August 19th – American astronomer Milton Humason was born in Dodge Center, Minnesota.
Humason's careful measurement of the radial velocities of several hundred galaxies underpinned the work of Edwin Hubble.
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. On this day in 1982 – August 19th – Soviet cosmonaut Svetlana Savitskaya became the second woman to go into space.Her flight on the Soyuz T-7 took place 19 years after that of the first woman in space, Valentina Tereshkova..
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On this day in 1975 – August 20th – NASA's Viking 1 was launched. (It was followed three weeks later by Viking 2).
A year after the launch it became the first spacecraft to land successfully on Mars and perform its mission.
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On this day in 1976 – August 22nd – the Soviet Luna 24 mission returned soil samples from the Moon.
These samples were different from the previous sample return missions because they were collected from 2.5 meters below the surface.
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. On this day in 1966 – August 23rd – NASA's Lunar Orbiter 1 took the first picture of the Earth ever taken from the Moon.The spacecraft's primary mission was to photograph smooth areas of the lunar surface for selection and verification of safe landing sites for the Surveyor and Apollo missions..
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On this day in 2006 – August 23rd – a vote by the General Assembly of the International Astronomical Union changed the classification of Pluto from planet to the new category of dwarf planet.
Two of the reasons for the reclassification were Pluto's small size (smaller than the Moon) and its highly elliptical tilted orbit which overlaps with that of Neptune.
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On this day in 1609 – August 25th – Galileo Galilei made the first recorded demonstration of a telescope.
He demonstrated to Venetian lawmakers a telescope he had made - it had a magnification about 8 or 9.
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. On this day in 1989 – August 25th – NASA's Voyager 2 spacecraft flew past Neptune.Voyager 2 is still the only spacecraft to have visited Neptune..
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On this day in 2003 – August 25th – NASA's Spitzer Space Telescope was launched.
Spitzer was an infrared telescope whose mission ended on January 30, 2020.
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