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发帖数: 1994 | 1 The Hubble Deep Field
Credit: R. Williams, The HDF Team (STScI), NASA
Explanation: Galaxies like colorful pieces of candy fill the Hubble Deep Field - one of
humanity's most distant optical views of the Universe. The dimmest, some as faint as 30th
magnitude (about four billion times fainter than stars visible to the unaided eye), are very
distant galaxies and represent what the Universe looked like in the extreme past, perhaps
less than one billion years after the Big Bang. To make |
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