Perspective

Microlensing Sheds Light on Dark Matter

Science  31 Jan 1997:
Vol. 275, Issue 5300, pp. 626-627
DOI: 10.1126/science.275.5300.626

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Summary

Most of the universe is dark matter, but the actual nature of this matter is unknown. Gravitational lensing—the bending of light from distant stars by matter—may offer some clues. As Hewett and Warren discuss in their Perspective, recent observations of gravitational microlensing by compact masses are leading to a better understanding of how the universe is populated by matter in our own galaxy and elsewhere.

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