New
#1631
Neat. Thanks
and Happy New Year everyone.
The Space Stuff thread
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New #1632
That app is not available in my country Nigel. Crazy. There are lots of other apps I can try.
A general article with links and dates. (Moons, Meteor Showers, Space Station)
Meteor showers, eclipses, full moons: All of the reasons to look up in 2022 - CNN
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New #1633
Continuous status of the JWST [James Webb Space Telescope]
Sunshield Tensioning Begins! - James Webb Tracker! #NASA #WEBB - YouTubeLast edited by Barman58; 04 Jan 2022 at 04:26.
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New #1636
Being 70years young and a child of the "cold war"; Ever experience air raid drills in the early 50's? I knew about the AN/FSQ-7 (DC-01) computer in the late 60's.
Thank the powers that be for miniaturization... My property is only 0.48acres 70' x 300'...The AN/FSQ-7 computer contained 49,000 vacuum tubes, occupied 0.5 acres (2,000 m2) of of floor space, weighed 275 tons, and used up to three megawatts of power. Performance was about 75,000 instructions per second. From the standpoint of physical dimensions, the 24 AN/FSQ-7s remain the largest computers ever built.
Source
Another comparison:
Would your phone be powerful enough to get you to the moon like Apollo did?On board Apollo 11 was a computer called the Apollo Guidance Computer (AGC). It had 2048 words of memory which could be used to store “temporary results” – data that is lost when there is no power. This type of memory is referred to as RAM (Random Access Memory). Each word comprised 16 binary digits (bits), with a bit being a zero or a one. This means that the Apollo computer had 32,768 bits of RAM memory.
In addition, it had 72KB of Read Only Memory (ROM), which is equivalent to 589,824 bits. This memory is programmed and cannot be changed once it is finalised. A single alphabetical character – say an “a” or a “b” – typically requires eight bits to be stored. That means the Apollo 11 computer would not be able to store this article in its 32,768 bits of RAM. Compare that to your mobile phone or an MP3 player and you can appreciate that they are able to store much more, often containing thousands of emails, songs and photographs.
Source
Related: The latest USB-C chargers are apparently more powerful than Apollo 11’s computer
All thx to miniaturization,
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New #1638
Just make them with tubes like this.
Can submerging a vacuum tube in water going to increase the output MU/MA?
Can submerging a vacuum tube in water going to increase the output MU/MA? - Quora
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New #1639
My high school got one of the NASA presentations.
What I remember is the guy showing us how computers went from vacuum tubes/valves to small chips.
A vacuum tube/vale, but not as large as those posted above. Then a smaller one, about 3 inches tall.
Then peanut tubes, that had wires instead of pins. The wires were soldered to the board.
Then 4 black dots, he said was the computer. I remember the dots being about half an inch across.
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