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On this day in 1980 – October 10th – the Very Large Array was dedicated.

Now known as the Karl G. Janksy Array, it's an important radio telescope facility in New Mexico.

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On this day in 1758 – October 11th – German physician and astronomer Heinrich Olbers was born.

Olbers is best remembered for his discovery of the asteroids Pallas and Vesta.

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On this day in 1964 – October 12th – the Soviet Voskhod 1 was launched. It was the first three-person space flight.

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On this day in 1994 – October 13th – the Magellan mission ended with the spacecraft sent plunging into Venus.

The Magellan spacecraft - also referred to as the Venus Radar Mapper mapped the surface of Venus and measured the planetary gravitational field. when contact was lost with the spacecraft that had been sent plunging into the atmosphere of Venus.

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On this day in 1987 – October 15th – the NASA/ESA Cassini-Huygens mission was launched to study the Saturnian system.


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On this day in 1829 – October 15th – American astronomer Asaph Hall was born.

Hall is best known for his discovery of the two moons of Mars.

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On this day in 2003 – October 15th – China launched Shenzhou 5.

Shenzhou 5 was the China's first manned spaceflight, with Yang Liwei as the first Chinese astronaut.

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On this day in 1956 – October 17th – Mae Jemison was born.

She was a NASA astronaut and the first African American woman in space. She is also known as an engineer, physician, university professor and businesswoman.

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On this day in 1967 – October 18th – Venera 4 made the first direct studies of Venus’s atmosphere.

The Soviet probe was the first probe to perform a successful in-place analysis of the environment of another planet.

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On this day in 1910 – October 19th – Indian-American astrophysicist and Nobel laureate Subrahmanyan Chandrasekhar was born.

He's known for his work in stellar evolution, including the Chandrasekhar Limit. That is the dividing line between the mass of a star that has spent its nuclear fuel and will collapse into a white dwarf and one massive enough to go out with a bang - a supernova. It's about 1.4 times the Sun's mass. Google posted a doodle today in honour of Chandrasekhar.

Last edited by Mona - Astronomy; 10/20/17 02:10 PM.
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