[Just thinking]

The distance from the Hubbles orbit to Earth is not infinity when referencing telescopes that are typically set up to view infinity as one would have when viewing the universe.  This is why the mirror was flawed, it's a fact as it happened because when the spy satellite disguised as a telescope was launched it WAS NOT A FUNCTIONING TELESCOPE.  Not sure why anyone would argue this as nothing that the government produces is what it says it is, remember when Hughes was mining manganese and really lifting a Soviet sub? Actually giving this camera a dual use made it more functional in the long run, but it did take photos of the Earth, with the highest resolution ever I do believe.

You have no understanding of optics the Hubble's primary mirror is about 8 feet in diameter a mirror of this size has a point of infinity of around 300 kilometres that means that if it is in focus on an object as close as 300 kilometres it needs no more in focus for objects at a further distance than that and the Hubble telescope was focused to look into infinity and it could look at the earth as the earth is further away than 300 kilometres but they don't waste time looking at the earth with the Hubble telescope as it was placed in orbit to study the universe. If the Hubble telescope was to focus on an object say 1 kilometre away it would have to move its camera /detector out of the craft so don't be silly and talk about a simple optical function that even your little telescope you have at home has. You know the focus tube moving in and out.

[Europa]

The distance from the Hubbles orbit to Earth is not infinity when referencing telescopes that are typically set up to view infinity as one would have when viewing the universe.  This is why the mirror was flawed, it's a fact as it happened because when the spy satellite disguised as a telescope was launched it WAS NOT A FUNCTIONING TELESCOPE.  Not sure why anyone would argue this as nothing that the government produces is what it says it is, remember when Hughes was mining manganese and really lifting a Soviet sub? Actually giving this camera a dual use made it more functional in the long run, but it did take photos of the Earth, with the highest resolution ever I do believe.

You have no understanding of optics the Hubble's primary mirror is about 8 feet in diameter a mirror of this size has a point of infinity of around 300 kilometres that means that if it is in focus on an object as close as 300 kilometres it needs no more in focus for objects at a further distance than that and the Hubble telescope was focused to look into infinity and it could look at the earth as the earth is further away than 300 kilometres but they don't waste time looking at the earth with the Hubble telescope as it was placed in orbit to study the universe. If the Hubble telescope was to focus on an object say 1 kilometre away it would have to move its camera /detector out of the craft so don't be silly and talk about a simple optical function that even your little telescope you have at home has. You know the focus tube moving in and out.

Well if the Hubble was placed in orbit to study the universe the knuckleheads doing the math really screwed up huh, because it could not focus on anything.  In actuality it was working perfectly when orbiting over the Kremlin.  So you seem to be in denial of what is really happening and or happened. 

Carry on, and do tell us again that the US government never lies about it's spy satellites.  LOL times infinity to the trillionth power.

[Just thinking]

Well if the Hubble was placed in orbit to study the universe the knuckleheads doing the math really screwed up huh, because it could not focus on anything.  In actuality it was working perfectly when orbiting over the Kremlin.  So you seem to be in denial of what is really happening and or happened.

Carry on, and do tell us again that the US government never lies about it's spy satellites.  LOL times infinity to the trillionth power.

The mirror was ground and polished incorrectly and it was a big embarrassment to the manufacturer but it was corrected on a later shuttle mission with small optics placed in front of the camera the problem was just like having bad eyesight so the telescope got corrective lenses.

[Europa]

Well if the Hubble was placed in orbit to study the universe the knuckleheads doing the math really screwed up huh, because it could not focus on anything.  In actuality it was working perfectly when orbiting over the Kremlin.  So you seem to be in denial of what is really happening and or happened.

Carry on, and do tell us again that the US government never lies about it's spy satellites.  LOL times infinity to the trillionth power.

The mirror was ground and polished incorrectly and it was a big embarrassment to the manufacturer but it was corrected on a later shuttle mission with small optics placed in front of the camera the problem was just like having bad eyesight so the telescope got corrective lenses.

That is exactly what the public was told, in reality the mirror was ground to the perfect specs if the mirror was turned onto the Earth

[Just thinking]

That is exactly what the public was told, in reality the mirror was ground to the perfect specs if the mirror was turned onto the Earth

No the telescope is in perfect focus at 300 kilometres and the earth is 500 kilometres from the telescope any object passed 300 kilometres is in perfect focus for the hubble if it looked at an object at a distance of 200 kilometres when focused to infinity it would look a little out of focus but there is nothing to look at closer than infinity for the Hubble if you have a little telescope at home and focus it on an object 2 kilometres away it is now focused to infinity. Just try and you will see. A little 2.5-inch objective will be focused for infinity at a distance of 2 kilometres so at a distance of 4 kilometres the focus will be of axis by no more than 2.5 inches which is non desernabal.

[Europa]

That is exactly what the public was told, in reality the mirror was ground to the perfect specs if the mirror was turned onto the Earth

No the telescope is in perfect focus at 300 kilometres and the earth is 500 kilometres from the telescope any object passed 300 kilometres is in perfect focus for the hubble if it looked at an object at a distance of 200 kilometres when focused to infinity it would look a little out of focus but there is nothing to look at closer than infinity for the Hubble if you have a little telescope at home and focus it on an object 2 kilometres away it is now focused to infinity. Just try and you will see. A little 2.5-inch objective will be focused for infinity at a distance of 2 kilometres so at a distance of 4 kilometres the focus will be of axis by no more than 2.5 inches which is non desernabal.

Again the Hubble mirror was screwed up as in not perfect.  You seem to be creating a new reality

[Just thinking]

Again the Hubble mirror was screwed up as in not perfect.  You seem to be creating a new reality

Yes it was screwed up and others have told you that and I'm telling you that the company that made the mirror for the Hubble had a problem with the equipment that is used to check the accuracy of the grinding of the mirror it was a big blunder but it was fixed in space by a second shuttle mission and it was for looking at the universe and it sent images back to earth 500 kilometres away of very distant galaxies among other astronomical things. It can not read newspapers on earth if it could it would be able to see astronaut footprints on the moon and it can not do that.

[Colin2B]

.......In actuality it was working perfectly when orbiting over the Kremlin.  So you seem to be in denial of what is really happening and or happened. 

You have been warned about publishing unsubstantiated conspiracy theories.
If you continue you will be banned.

[Bored chemist]

the knuckleheads doing the math really screwed up huh,

No. The engineers doing the polishing screwed up.

That is exactly what the public was told, in reality the mirror was ground to the perfect specs if the mirror was turned onto the Earth

The shape you need is the same whether you point it up or down.
The different object distance would be accommodated by moving the mirror in or out slightly (as I calculated, about 1/4 of an inch), just like when you focus a camera.

[Bored chemist]

Again the Hubble mirror was screwed up as in not perfect. 

The focus was fine, but the mirror had not been ground to a parabola.

[Just thinking]

Don't no about spare parts but the telescope is a fantastic thing. the distant galaxies that it has imaged are incredible the magnification of the Hubble is very powerful as it has a focal length of 190 feet that is an F21 the telescope is a Cassegrain reflector a folded optical system that is a compact version of Isaac newton's reflector design. the telescope is racing around the earth at 8 kilometres per second and is about 500 kilometres above us. I wish I had the Hubble telescope in my backyard.

[Europa]

Again the Hubble mirror was screwed up as in not perfect. 

The focus was fine, but the mirror had not been ground to a parabola.

Actually because of the mirror flaw the software was not able to achieve a focus, at least that is what we were told.  I still say that the mirror was fine when pointed at the Kremlin which was the purpose.  But people like you think that blurry images of nebulas were important

[Just thinking]

Actually because of the mirror flaw the software was not able to achieve a focus, at least that is what we were told.  I still say that the mirror was fine when pointed at the Kremlin which was the purpose.  But people like you think that blurry images of nebulas were important

Can you explain how it is possible for the earth to be in focus but not the stars? Optics with misshapen lenses are no good at any distance.

[Bored chemist]

Again the Hubble mirror was screwed up as in not perfect. 

The focus was fine, but the mirror had not been ground to a parabola.

Actually because of the mirror flaw the software was not able to achieve a focus, at least that is what we were told.  I still say that the mirror was fine when pointed at the Kremlin which was the purpose.  But people like you think that blurry images of nebulas were important

Do you understand that focusing a  telescope is moving the mirror (or the eyepiece) back and to in order to accommodate different distances to the object you are looking at and that aberration is what you get when the mirror is not the right shape?

They are different problems.
On is easy to fix, you just focus the thing.
The other is more difficult- you need to replace the mirror or use a corrector plate.
This plate is not the equivalent of glasses for someone who is short (or long) sighted.

[Bored chemist]

I still say that the mirror was fine when pointed at the Kremlin which was the purpose.

You can buy a postcard of the Kremlin with a better picture than you could get from Hubble.

[Europa]

Actually because of the mirror flaw the software was not able to achieve a focus, at least that is what we were told.  I still say that the mirror was fine when pointed at the Kremlin which was the purpose.  But people like you think that blurry images of nebulas were important

Can you explain how it is possible for the earth to be in focus but not the stars? Optics with misshapen lenses are no good at any distance.

Hubble was a camera the mirror was only one part, lenses and computer software and a CCD were all required for focus and image capture

Next

[Europa]

I still say that the mirror was fine when pointed at the Kremlin which was the purpose.

You can buy a postcard of the Kremlin with a better picture than you could get from Hubble.

Quite possibly true as I have not seen the images, but those images were the entire purpose of Hubble.  That said why do you speculate that the images would be inferior to any other spy satellite of the era?

Nyuk Nyuk Nyuk

[Bored chemist]

why do you speculate that the images would be inferior to any other spy satellite of the era?

Because I understand basic common sense.
The spy satellites were near the earth; the Hubble telescope was far away.

[Bored chemist]

Actually because of the mirror flaw the software was not able to achieve a focus, at least that is what we were told.  I still say that the mirror was fine when pointed at the Kremlin which was the purpose.  But people like you think that blurry images of nebulas were important

Can you explain how it is possible for the earth to be in focus but not the stars? Optics with misshapen lenses are no good at any distance.

Hubble was a camera the mirror was only one part, lenses and computer software and a CCD were all required for focus and image capture

Next

No.
When you write "Next" like that you have to have answered the question, and you didn't
If it was broken, how did it work?

[Just thinking]

Hubble was a camera the mirror was only one part, lenses and computer software and a CCD were all required for focus and image capture

Next

Thats got nothing to do with your own argument about the primary mirror so you have just gone off on a tangent that makes no sense at all. So now we have a camera and maybe some smaller lenses that apparently will only perform on an object that is 500 kilometres away and nothing else. Strange.