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"This figure shows an overlay of an image of the Moon on top of an image of the sky recorded simultaneously by the 36 detectors of Euclid’s VIS instrument." ht

"This figure shows an overlay of an image of the Moon on top of an image of the sky recorded simultaneously by the 36 detectors of Euclid’s VIS instrument." https://www.esa.int/ESA_Multimedia/Images/2023/11/Euclid_s_wide-eyed_look_at_the_cosmos https://www.esa.int/ESA_Multimedia/Images/2023/11/Euclid_s_w... Worth a click.

twic 3y ago
Oh, so it's a Samsung?
dylan604 3y ago
I have a wide field telescope at home that yields a similar field of view when I image the moon. Too bad my scope doesn't have the same imaging abilities as this. I'm guessing a few more 0s and a couple additional commas added to the price tag helps.
- hn8305823 3y ago
  Euclid has a 1.2m primary mirror. For $600k you can have a 1m telescope in your backyard. You will still have to deal with the atmosphere, clouds, and Moon, however. Especially clouds. https://planewave.com/product/pw1000-1-meter-observatory-system/ https://planewave.com/product/pw1000-1-meter-observatory-sys...
  - dcormier 3y ago
    adds to Christmas list
  - braydenm 3y ago
    For those looking for something large but still a little bit more realistic, for <$3k you can have a 0.4m telescope on your backyard. https://hubble-optics.com/UL16.html https://hubble-optics.com/UL16.html
    - dylan604 3y ago
      The astronomy campus I used to make regular visits to had a pair of 36" Dobs. They were tall enough that you would need a ladder of some sort to reach the eyepiece depending on the position. I only got to view with my eyes, but they were impressive compared to my 6". I always wanted to try imaging from one of those. The same place also had a pair similar to the link you provided, only, they were set up to be a stereoscopic viewing. I never got that experience though as nobody ever wanted to go through the painful alignment process. People have come up with some interesting ideas on how to view the sky
  - p-e-w 3y ago
    Six hundred thousand dollars for a 1m telescope? That's a crazy price tag. What's the expensive part here? That's the price of 10 upper-tier cars. Is it so insanely difficult to make that mirror, or are they just gouging because they have little or no competition?
    - dylan604 3y ago
      That's like asking why a Ferrari costs so much, it's just a car. There's a big difference from a mass produced car with automated processes compared to a product that is pretty much one offs and are made by hand. Pretty much every industry has the equivalent mass produced vs hand made. Leica makes camera lenses for the masses, but they also have a very expensive line of lenses that they only start the hand made process when you're check clears. Clothing, homes, etc all have versions of it. So unless you can tell me that you've hand ground a telescope mirror of any size to have direct knowledge of the experience, I'd suggest taking a look at the process while considering the size of the mirror discussed. Even the base and the trusses for the assembly will have required design time and iterating through changes. Not sure why this seems so strange compared to all of the other things in life with "accepted" price tags.
      - baq 3y ago
        Spot on, for a concrete example check this one out - there's a slight chance these are mass produced https://www.usa.canon.com/shop/p/rf1200mm-f8-l-is-usm-lens https://www.usa.canon.com/shop/p/rf1200mm-f8-l-is-usm-lens but the f5.6 version... doesn't seem to be: https://www.the-digital-picture.com/Reviews/Canon-EF-1200mm-f-5.6-L-USM-Lens-Review.aspx https://www.the-digital-picture.com/Reviews/Canon-EF-1200mm-...
        dylan604 3y ago
        >https://www.usa.canon.com/shop/p/rf1200mm-f8-l-is-usm-lens https://www.usa.canon.com/shop/p/rf1200mm-f8-l-is-usm-lens "Minimum focus distance of Approx. 14.1 ft. / 4.3 m. " Which is conveniently able to be measured by taking the distance from the camera mount to the end of the lens, then doubling it! However, at least this is "affordable" enough to have a price listed. The Leica lenses I was referring to has the "oh boy, this is going to be expensive" infamous Find a Dealer button. Also, it's a set of 11 lenses, and for nearly double the price, they add in a few more wide angles and a few more telephoto lenses to the kit. https://www.leitz-cine.com/product/summicron-c https://www.leitz-cine.com/product/summicron-c
  - sjackso 3y ago
    Ah, yes-- but if you shop around, you can find a telescope of that aperture for less. Here's one for a mere $132k! https://explorescientificusa.com/collections/optiques-fullum-folded-newtonians/products/optiques-fullum-folded-newtonian-40-f-3-5 https://explorescientificusa.com/collections/optiques-fullum...
Sharlin 3y ago
There are about 41,000 square degrees in a sphere, so it would take roughly 82,000 of Euclid's 0.7°x0.7° exposures to image the entire sky. (The plan is to image one third or so.)
- mr_mitm 3y ago
  The rest is obscured by the milky way, for anyone wondering.
d--b 3y ago
Very nice, it’s one of the only image that gives some feeling about how much stuff there is in the universe.

twic 3y ago

Oh, so it's a Samsung?

dylan604 3y ago

I have a wide field telescope at home that yields a similar field of view when I image the moon. Too bad my scope doesn't have the same imaging abilities as this. I'm guessing a few more 0s and a couple additional commas added to the price tag helps.

hn8305823 3y ago
Euclid has a 1.2m primary mirror. For $600k you can have a 1m telescope in your backyard. You will still have to deal with the atmosphere, clouds, and Moon, however. Especially clouds. https://planewave.com/product/pw1000-1-meter-observatory-system/ https://planewave.com/product/pw1000-1-meter-observatory-sys...
- dcormier 3y ago
  adds to Christmas list
- braydenm 3y ago
  For those looking for something large but still a little bit more realistic, for <$3k you can have a 0.4m telescope on your backyard. https://hubble-optics.com/UL16.html https://hubble-optics.com/UL16.html
  - dylan604 3y ago
    The astronomy campus I used to make regular visits to had a pair of 36" Dobs. They were tall enough that you would need a ladder of some sort to reach the eyepiece depending on the position. I only got to view with my eyes, but they were impressive compared to my 6". I always wanted to try imaging from one of those. The same place also had a pair similar to the link you provided, only, they were set up to be a stereoscopic viewing. I never got that experience though as nobody ever wanted to go through the painful alignment process. People have come up with some interesting ideas on how to view the sky
- p-e-w 3y ago
  Six hundred thousand dollars for a 1m telescope? That's a crazy price tag. What's the expensive part here? That's the price of 10 upper-tier cars. Is it so insanely difficult to make that mirror, or are they just gouging because they have little or no competition?
  - dylan604 3y ago
    That's like asking why a Ferrari costs so much, it's just a car. There's a big difference from a mass produced car with automated processes compared to a product that is pretty much one offs and are made by hand. Pretty much every industry has the equivalent mass produced vs hand made. Leica makes camera lenses for the masses, but they also have a very expensive line of lenses that they only start the hand made process when you're check clears. Clothing, homes, etc all have versions of it. So unless you can tell me that you've hand ground a telescope mirror of any size to have direct knowledge of the experience, I'd suggest taking a look at the process while considering the size of the mirror discussed. Even the base and the trusses for the assembly will have required design time and iterating through changes. Not sure why this seems so strange compared to all of the other things in life with "accepted" price tags.
    - baq 3y ago
      Spot on, for a concrete example check this one out - there's a slight chance these are mass produced https://www.usa.canon.com/shop/p/rf1200mm-f8-l-is-usm-lens https://www.usa.canon.com/shop/p/rf1200mm-f8-l-is-usm-lens but the f5.6 version... doesn't seem to be: https://www.the-digital-picture.com/Reviews/Canon-EF-1200mm-f-5.6-L-USM-Lens-Review.aspx https://www.the-digital-picture.com/Reviews/Canon-EF-1200mm-...
      - dylan604 3y ago
        >https://www.usa.canon.com/shop/p/rf1200mm-f8-l-is-usm-lens https://www.usa.canon.com/shop/p/rf1200mm-f8-l-is-usm-lens "Minimum focus distance of Approx. 14.1 ft. / 4.3 m. " Which is conveniently able to be measured by taking the distance from the camera mount to the end of the lens, then doubling it! However, at least this is "affordable" enough to have a price listed. The Leica lenses I was referring to has the "oh boy, this is going to be expensive" infamous Find a Dealer button. Also, it's a set of 11 lenses, and for nearly double the price, they add in a few more wide angles and a few more telephoto lenses to the kit. https://www.leitz-cine.com/product/summicron-c https://www.leitz-cine.com/product/summicron-c
- sjackso 3y ago
  Ah, yes-- but if you shop around, you can find a telescope of that aperture for less. Here's one for a mere $132k! https://explorescientificusa.com/collections/optiques-fullum-folded-newtonians/products/optiques-fullum-folded-newtonian-40-f-3-5 https://explorescientificusa.com/collections/optiques-fullum...

Sharlin 3y ago

There are about 41,000 square degrees in a sphere, so it would take roughly 82,000 of Euclid's 0.7°x0.7° exposures to image the entire sky. (The plan is to image one third or so.)

mr_mitm 3y ago
The rest is obscured by the milky way, for anyone wondering.

d--b 3y ago

Very nice, it’s one of the only image that gives some feeling about how much stuff there is in the universe.