In our “40 greatest astronomical discoveries” article, we picked the cream of the crop in cosmic breakthroughs. But the list could have gone on and on. Here, we make another small dent in the endless inventory of scientific advances by adding 10 more that bubbled just under the top 40. As we did in the feature article, we number the entries from nearby to far away. And we invite you to comment on discoveries you would add to the list or think should not have been rated so highly.
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