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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 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 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 designed 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 28th - the first docking between the Soviet space station Mir and the American Space Shuttle took place.

Daniel Goldin, chief of NASA, called it the beginning of “a new era of friendship and cooperation” between the U.S. and Russia. It helped to pave the way for the creation of the International Space Station.



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On this day in 1868 - June 29th - George Ellery Hale, American solar astronomer, was born.

Hale was a key figure in the realization of three major telescopes, the 40-inch refractor at Yerkes Observatory, 60-inch Hale and 100-inch Hooker reflectors at Mount Wilson Observatory, and the 200-inch Hale reflector at Palomar Observatory



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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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On this day in 1990 - June 30th - the joint ESA/NASA Ulysses mission came to an end after 18 years in service.

Ulysses was the first ever spacecraft to explore space above and below the Sun's poles. When it was launched it had a nominal lifetime of five years.

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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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