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Author Topic: Will E-ELT find Earth twins in the goldilocs zone  (Read 1738 times)

Offline syhprum

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E-ELT is a proposed 42m telescope due to be constructed in Brazil (I remember as a boy wondering if the Hale 200" would ever be completed)
An excellent article here lists the technical problems and observing strategy here.

http://www.eso.org/sci/facilities/eelt/science/doc/drm_report.pdf


 

Offline imatfaal

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Will E-ELT find Earth twins in the goldilocs zone
« Reply #1 on: 27/01/2011 14:49:27 »
does that Acronym stand for European Excessively Large Telescope? ...Enviably Large, Enormously large, Elephantine Lens...

I must admit I have never understood the physics of why we cannot use a myriad of small mirrors bolted together.  I have three aluminium discs on my desk that are manufactured to an incredibly low error tolerance and yet they are mass produced and fairly cheap (HDD platers - now used as coasters). 

I will read that ESO prgramme with interest - thanks
 

Offline CliffordK

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Will E-ELT find Earth twins in the goldilocs zone
« Reply #2 on: 27/01/2011 16:27:50 »
Whew...
A big "summary" for a big telescope.

I suppose I must ask if there is a large benefit of having 100 off-axis mirrors pointed towards a single photo receptor versus having an array of a hundred telescopes each with their own photoreceptors, and able to be focused either together, or independently.

A distributed array wouldn't have to be located at the same site either.
 

Offline Soul Surfer

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Will E-ELT find Earth twins in the goldilocs zone
« Reply #3 on: 27/01/2011 22:55:38 »
The advantage of the large single mirror is sensitivity multiple telescopes can offer advantages of resolution although separation distance are limited compared with radio telescopes because of phase stability requirements.
 

Offline Bored chemist

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Will E-ELT find Earth twins in the goldilocs zone
« Reply #4 on: 28/01/2011 07:17:46 »
does that Acronym stand for European Excessively Large Telescope? ...Enviably Large, Enormously large, Elephantine Lens...

I must admit I have never understood the physics of why we cannot use a myriad of small mirrors bolted together.  I have three aluminium discs on my desk that are manufactured to an incredibly low error tolerance and yet they are mass produced and fairly cheap (HDD platers - now used as coasters). 

I will read that ESO prgramme with interest - thanks

Imagine bolting lots of them together. The thickness of the composite disk would be the same, but the weight and length would be bigger. It would be too floppy.
 

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Will E-ELT find Earth twins in the goldilocs zone
« Reply #4 on: 28/01/2011 07:17:46 »

 

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