standard candles and donor chemistry

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standard candles and donor chemistry

Postby codifies » Mon Jul 20, 2015 11:57 pm

As I understand standard candles they are binary stars where the dying partner is stealing mass, when it hits (always the same) critical mass it explode - same mass = same brightness...

...but what of the donor chemistry, could that not effect the "colour" of the light or even the temperature of the explosion? Would that then not effect the distance measurement because the brightness would be even slightly be effected ?

On a slightly related note if you use the width of the orbit of earth (ie measure 6 month apart) what is the practical distance measurement limit of this binocular vision?
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Re: standard candles and donor chemistry

Postby david48 » Thu Sep 03, 2015 8:23 pm

codifies wrote:
On a slightly related note if you use the width of the orbit of earth (ie measure 6 month apart) what is the practical distance measurement limit of this binocular vision?


This is an interesting question. Leaving aside the matter of binocular vision, suppose two telescopes were launched into orbit 6 months apart. So each telescope was inserted at the opposite side of the Earth's orbit.

The Earth's orbit has a diameter of 186,000,000 miles. So two telescopes at opposite sides of the orbit, would provide the combined resolving power of a telescope with an effective aperture of 186,000,000 miles!

This would provide a truly extraordinary degree of resolution. Easily enough to see details on planets 100,000 light years away, and even examine planets in neighbouring galaxies such as M31. Or more remote galaxies!

Why hasn't this been done yet?
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Re: standard candles and donor chemistry

Postby codifies » Fri Sep 04, 2015 1:28 am

It seemed an obvious thing to do!
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Re: standard candles and donor chemistry

Postby david48 » Fri Sep 04, 2015 6:27 pm

codifies wrote:It seemed an obvious thing to do!


It could be done, and probably would've been done, if NASA wasn't constricted by dumb politicians who keep cutting its budget.

What we need is Scientists in charge of the government. Then the government would fund the construction of two giant telescopes, each with an aperture of 100 metres, placed on each side of the Earth's orbit. This would reveal a tremendous amount of new data about the Universe.

And cost much less than the 50+ billion dollars that the US government is spending on the F-35 strike-fighter aircraft, which won't do anyone any good.

Why can't scientists take charge, and lead humanity to our proper future?
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