Vanilla 1.1.9 is a product of Lussumo. More Information: Documentation, Community Support.

Technology: Astronomy Domine

Bottom of Page

4181 to 4200 of 4403

  1. <
  2. 1
  3. ...
  4. 206
  5. 207
  6. 208
  7. 209
  8. 210
  9. 211
  10. 212
  11. 213
  12. ...
  13. 221
  14. >
    • CommentAuthorAsterix
    • CommentTimeNov 20th 2020
     
    Didn't know that. Nevermind.
  2.  
    I knew that. But it's pointed in the wrong direction!
    •  
      CommentAuthorAngus
    • CommentTimeNov 20th 2020 edited
     
    East?

    Seriously, it's fairly steerable. Wiki says

    "The maximum zenith angle is 40-degree when the effective illuminated aperture is reduced to 200 m, while it is 26.4-degree when the effective illuminated aperture is 300 m without loss.[33][3]:13

    Although the reflector diameter is 500 metres (1,600 ft), only a circle of 300 m diameter is used (held in the correct parabolic shape and "illuminated" by the receiver) at any one time.[21]:13 The telescope can be pointed to different positions on the sky by illuminating a 300 meter section of the 500 meter aperture."
  4.  
    Al means "wrong hemisphere" possibly. But is this true? All of Puerto Rico lies also in the northern one.
    •  
      CommentAuthorAngus
    • CommentTimeNov 20th 2020
     
    25°39′11″N 106°51′24″E
    • CommentAuthorkorkskrew
    • CommentTimeNov 22nd 2020
     
    I'm having an unexpectedly emotional response to the news about the Arecibo dish.
    •  
      CommentAuthorpcstru
    • CommentTimeNov 25th 2020 edited
     
    • CommentAuthorAsterix
    • CommentTimeNov 25th 2020
     
    Fake, I think. If the photographer did this in a single exposure, the foreground would be blurred, as the photo of the sky was doubtless taken with a tracking 'scope.
    •  
      CommentAuthorpcstru
    • CommentTimeNov 25th 2020
     
    Posted By: AsterixFake, I think. If the photographer did this in a single exposure, the foreground would be blurred, as the photo of the sky was doubtless taken with a tracking 'scope.

    The link explains the image. There is no claim to be a single exposure, as I read it, it is 46 'images'.
    • CommentAuthorAsterix
    • CommentTimeNov 25th 2020
     
    Ah so, I missed that, thanks!

    I thought at first this might be one of those Chinese outfits advertising cheap telescopes with an optical sensor.
    • CommentAuthorkorkskrew
    • CommentTimeDec 1st 2020
     
    This feels like it should go in the RIP thread.
    Arecibo collapse
    •  
      CommentAuthorAngus
    • CommentTimeDec 1st 2020
     
    What? No video!?
    • CommentAuthorkorkskrew
    • CommentTimeDec 1st 2020
     
    •  
      CommentAuthoraber0der
    • CommentTimeDec 1st 2020
     
    Isn't an.dromeda supposed to only have one hunch?

    (asking for an austrophysicist)
    •  
      CommentAuthorAngus
    • CommentTimeDec 1st 2020
     
    You're right! It's only the Bacteria that have two.
    • CommentAuthorloreman
    • CommentTimeDec 1st 2020
     
    Ha!

    Talk about deserting ships!
  17.  
    Like the ones stranded in the Aral Sea? (now a desert)
    •  
      CommentAuthorAngus
    • CommentTimeDec 2nd 2020
     
    That's Arrant nonsense!
  19.  
    •  
      CommentAuthorAngus
    • CommentTimeDec 4th 2020
     
    Posted By: AngusWhat? No video!?


    Actually, there is video

4181 to 4200 of 4403

  1. <
  2. 1
  3. ...
  4. 206
  5. 207
  6. 208
  7. 209
  8. 210
  9. 211
  10. 212
  11. 213
  12. ...
  13. 221
  14. >
Back to Discussions Top of Page