Update README.md

README.md

@@ -124,6 +124,8 @@ The ESA Hubble [Advanced Image Search](http://esahubble.org/images/archive/searc
  * images with Minimum size greater than or equal to 400x300
  * Ranking greater than or equal to Fair or better
  * Type containing 'Observation'
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 This reduced significantly the number of images which had nothing to do with Hubble deep space scans.
 A total of around 3,000 space images were collected with this method.
 
@@ -135,6 +137,8 @@ Further automatic and manual filtering was performed to remove the following:
  * space renders
  * diagrams with text
  * images of celestial bodies within our solar system
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 This brought the total number of deep space images down to 2,593.
 This process was not perfect, and there likely remain some images in the dataset that should be removed in the future.