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Old 16-03-2017, 02:18 PM
JA
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NASA plans to make a telescope out of the Sun

For something different:
https://www.engadget.com/2017/03/15/...ut-of-the-sun/


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Last edited by JA; 16-03-2017 at 02:37 PM. Reason: Reposted hyperlink
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Old 16-03-2017, 02:28 PM
gary
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Thanks JA, but you might want to check and edit the link as it is not a valid URL.

The story also appears here :-
https://www.engadget.com/2017/03/15/...ut-of-the-sun/
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Old 16-03-2017, 02:35 PM
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Quote:
Originally Posted by gary View Post
Thanks JA, but you might want to check and edit the link as it is not a valid URL.

The story also appears here :-
https://www.engadget.com/2017/03/15/...ut-of-the-sun/
Thanks Gary, that's the page I linked to (and now relinked), but somehow my original cut/paste was NQR. Thanks

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Old 16-03-2017, 02:51 PM
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The ultimate telescope...
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Old 16-03-2017, 07:06 PM
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Shiraz (Ray)
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what a cool idea.

and if you use the sun as a lens this end at this end and set up a similar system on the other side of Alpha Centauri, you could communicate across the intervening light years using a laser pointer - apparently less than a mW would do..Maybe future SETI could be based on something like this

Last edited by Shiraz; 16-03-2017 at 10:23 PM.
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Old 17-03-2017, 08:23 AM
rally
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Wow - A 1000x1000 pixel image of an exoplanet !!!

Only need to move your telescope a 100AU's to slew to the next target !
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Old 25-03-2017, 01:46 PM
geolindon (Lindon)
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planet lensing?

thanks JA for another interesting link

are our outer planets massive enough to provide a lesser but more accessible effect?
eg Jupiter at 1,000th of the sun's mass ?and 1,000th of the magnification at ??1,000th the distance ie .55 au
at 550 au the Sun lense/magnifies from a couple of pixels to 1,000x1,000 so Jupiter would give us 33x33 ?? still damn awesome!

it can't be that simple, can it 'please explain'
L
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Old 25-03-2017, 02:37 PM
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I think that it works the other way Lindon - Jupiter has much less mass than the sun, so the light focuses much further out - by some estimates, the focal zone starts at maybe 5000AU.
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Old 26-03-2017, 01:16 PM
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Nice!
I wonder what the maths are for mass versus focal point distance.

I also remember reading some time ago the idea of using lasers to heat the atmosphere (likes we need more of that ) in such an exact way that the a section of the atmosphere could then act as a lens
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