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On this day in 1675 - June 22nd - the Royal Observatory Greenwich was founded.

The Prime Meridian (0 degrees of longitude) goes through Greenwich.


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On this day in 1999 - June 24th - NASA's Far Ultraviolet Spectroscopic Explorer (FUSE) was launched.

Operated by the Johns Hopkins University Applied Physics Laboratory, for eight years, it detected light in a part of the electromagnetic spectrum which is mostly unobservable by other telescopes.


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On this day in 1894 - June 25th - German physicist and engineer Hermann Oberth was born.

Oberth is considered one of the founding fathers of rocketry and astronautics.


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On this day in 1730 - June 26th - French astronomer Charles Messier was born.

Messier discovered so many comets that King Louis XV called him a "comet ferret". Messier's name is still known for his catalogue of nebulous objects that might be taken for comets.


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On this day in 1914 - June 26th - American theoretical physicist and astronomer Lyman Spitzer, Jr. was born.


His major contributions to astronomy included his studies of star formation and the interstellar medium. The Spitzer Space Telescope is named in his honor.


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On this day in 2013 - June 27th - NASA's IRIS (Interface Region Imaging Spectrograph) was launched.


IRIS was deisgned to investigate the physical conditions of the solar limb, particularly the chromosphere of the Sun.


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On this day in 1912 - June 28th - Australian radio astronomer Ruby Payne-Scott was born.


Payne-Scott was a pioneer in radiophysics and radio astronomy, and was the first female radio astronomer.


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On this day in 1995 - June 29th - the first docking between the Soviet space station Mir and the American Space Shuttle took place.





Last edited by Mona - Astronomy; 06/29/18 02:18 PM.

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On this day in 1908 - June 30th - an asteroid impact leveled hundreds of miles of Siberian forest around Tunguska.

The event is classified as an impact even, but is thought to have been caused by a meteoroid exploding above ground. No impact crater has ever been found.


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On this day in 2001 - June 30th - the Wilkinson Microwave Anistotropy Probe (WMAP) was launched.

This spacecraft operated from 2001 to 2010. Across the sky it measured tiny temperature differences in the cosmic microwave background (CMB) - the radiant heat left over from the Big Bang.


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