I am mad with love for the Hubble Deep Field and Ultra Deep Field images. I’ll never forget the first time I saw the HDF, at a wonderful public astrophysics lecture at Macquarie Uni. The lecturer explained that this is what you get when you point the Hubble at a patch of darkness less than one degree wide. How pretty, I thought, it’s full of stars! But those aren’t stars; they’re galaxies.


Now I am reading Timothy Ferris’ book The Whole Shebang, in which he casually comments that “…most galaxies are so far away that their light has not yet come within reach of our telescopes.”


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