Each day a different image or photograph of our fascinating universe is featured, along with a brief explanation written by a professional astronomer. These spots are the oldest, most distant structures known. They represent temperature variations in the early Universe. As our Universe expanded and cooled, conglomerations of mass formed. By studying the size and distribution of the spots found with COBE and future missions , astronomers hope to learn what matter and processes caused the spots to form - and hence determine the composition , density, and future of our Universe.
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