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Science 29 March 1996:
Vol. 271. no. 5257, p. 1809
DOI: 10.1126/science.271.5257.1809
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Research News

Andrew Watson

Cambridge, U.K.--With a relatively cheap prototype ground-based telescope, a British team has created an image of the cosmic microwave background--the faint echo of the big bang--that is many times sharper than those obtained from balloons and satellites. The secret of the instrument's sharp vision is interferometry: combining the signals from separate antennas into a single image. And while the image is largely a proof of principle, it is tantalizing astronomers by showing hot spots--peaks in the density of the primordial universe--that may mark the origins of present-day galaxy clusters.




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Science. ISSN 0036-8075 (print), 1095-9203 (online)