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Re: 2019: On this day . . . [Re: Mona - Astronomy] #931007
05/20/19 04:55 PM
05/20/19 04:55 PM
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On this day in 1990 - May 20th - the Hubble Space Telescope sent back its first image, that of several stars, captured with its Wide Field/Planetary Camera.

Unfortunately, they then discovered there was a flaw in the main mirror which meant fuzzy images for three years until the first shuttle servicing mission. Interestingly, the images were still much better than the ones from ground-based telescopes of the time.


Mona Evans
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Re: 2019: On this day . . . [Re: Mona - Astronomy] #931008
05/21/19 07:51 AM
05/21/19 07:51 AM
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On this day in 2010 - May 21st - the Japanese experimental aircraft IKAROS was launched.

IKAROS (Interplanetary Kite-craft Accelerated by Radiation Of the Sun) is the first spacecraft to successfully demonstrate solar sail technology in interplanetary space.


Mona Evans
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Re: 2019: On this day . . . [Re: Mona - Astronomy] #931009
05/22/19 06:23 AM
05/22/19 06:23 AM
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On this day in 2008 - May 25th - NASA's Phoenix lander landed on Mars.

Phoenix was expected to spend 90 Martian sols searching for environments suitable for microbial life. It carried out its mission for 157 Martian sols. [A sol is a Martian day - it's about 40 minutes longer than an Earth day.]


Mona Evans
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Re: 2019: On this day . . . [Re: Mona - Astronomy] #931011
05/23/19 04:52 AM
05/23/19 04:52 AM
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On this day in 1961 - May 25th - President John F. Kennedy challenged the USA to "commit itself to achieving the goal, before this decade is out, of landing a man on the Moon and returning him safely to the Earth."

Sadly, Kennedy didn't live to see it happen.


Mona Evans
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Re: 2019: On this day . . . [Re: Mona - Astronomy] #931012
05/24/19 08:02 AM
05/24/19 08:02 AM
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On this day in 1983 - May 26th - ESA's X-ray observatory, Exosat, was launched.

Exosat was the first European Space Agency mission to study the Universe at X-ray wavelengths, and one of the first unmanned satellites to feature an onboard computer. The spacecraft was operational from May 1983 to April 1986.


Mona Evans
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Re: 2019: On this day . . . [Re: Mona - Astronomy] #931016
05/25/19 06:54 AM
05/25/19 06:54 AM
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On this day in 1951 - May 26th - physicist, engineer, educator and astronaut Sally Ride was born.

Ride was the first American woman in space, her first flight almost twenty years to the day after cosmonaut Valentina Tereshkova became the first woman in space.


Mona Evans
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Re: 2019: On this day . . . [Re: Mona - Astronomy] #931022
05/26/19 09:13 AM
05/26/19 09:13 AM
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On this day in 1931 - May 27th - Swiss physicist and explorer Auguste Piccard, with Paul Kipfer, became the first persons to travel into the stratosphere.

They reached a record altitude in a balloon with a pressurized aluminum gondola designed by Piccard. Piccard wanted to measure the activity of cosmic rays and investigate Einstein's theory of relativity.


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Re: 2019: On this day . . . [Re: Mona - Astronomy] #931026
05/28/19 08:58 AM
05/28/19 08:58 AM
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On this day in 1919 - May 29th - Einstein’s General Theory of Relativity was tested during a total solar eclipse.

By comparing the apparent distance between stars in the constellation Taurus, with and without the Sun between them, British astrophysicist Arthur Eddington confirmed the theoretical predictions about gravitational lensing.


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Re: 2019: On this day . . . [Re: Mona - Astronomy] #931032
05/29/19 09:14 AM
05/29/19 09:14 AM
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On this day in 1794 - May 29th - German astronomer Johann Heinrich von Mädler was born.

Von Mädler, along with Wilhelm Beer, published Mappa Selenographica, the most complete map of the Moon at that time, and which remained unsurpassed for over forty years.


Mona Evans
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Re: 2019: On this day . . . [Re: Mona - Astronomy] #931039
05/30/19 02:03 PM
05/30/19 02:03 PM
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Mona - Astronomy Offline OP
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On this day in 1963 - May 30th - English chemist, astronaut and science communicator, Helen Sharman, was born.

Chosen to train as an cosmonaut, Sharman was the first Briton in space and the first woman to visit the Mir space station.



Mona Evans
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