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Astronomy Picture of the Day - Five Hundred Meter Aperture Spherical Telescope
NASA ^
| 09/29/2016
| (see photo credits)
Posted on 09/29/2016 5:41:29 AM PDT by ThomasMore
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To: ETL
Yes, Starship Troopers, Timeline are two that come to mind................
21
posted on
09/29/2016 6:47:10 AM PDT
by
Red Badger
(YES, I'm Deplorable! I Deplore the entire Democrat Party!....................)
To: ETL
Oh, I left out “I, Robot”, which was a complete farce.................
22
posted on
09/29/2016 6:50:58 AM PDT
by
Red Badger
(YES, I'm Deplorable! I Deplore the entire Democrat Party!....................)
To: wastoute
Whatever you do, don’t let them point it at the Sun! When I was designing and building satellite tracking antennas, we would use the sun as a good radio source to exercise the tracking. Could not keep in on there long off course as it heated the feed too much.
Much more convenient that waiting for a satellite transmitting the right frequencies to come over. Plus, very easy to get pointed close to the target.
To: wastoute
Whatever you do, don’t let them point it at the Sun!I wonder how many passing birds this dish fries when the sun is just right in the sky?
To: ThomasMore
With all that trouble, you'd think they would have made it parabolic -- to minimize spherical aberration.
OTOH. I guess there might be some freqency-spreading advantages of examining what is in the aberration fringe area...
25
posted on
09/29/2016 8:37:38 PM PDT
by
TXnMA
("Allah": Satan's current alias; "Barack": Allah's current ally...)
To: ThomasMore
They should put a BIG cistern under that central hole.
OTOH, with China's air pollution, that might not be such a good idea... '-)
26
posted on
09/29/2016 8:40:54 PM PDT
by
TXnMA
("Allah": Satan's current alias; "Barack": Allah's current ally...)
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