2 years ago
Astronomers Discover a Strange Galaxy Without Dark Matter
THREE YEARS AGO, Filippo Fraternali and his colleagues spotted a half dozen mysteriously diffuse galaxies, which looked like sprawling cities of stars and gas. But unlike almost every other galaxy ever seen—including our own Milky Way—they didn’t seem to be enshrouded in huge masses of dark matter, which would normally hold those stellar metropolises together with their gravity. The scientists picked one to zoom in on, a modest-sized galaxy about 250,000 light-years away, and they pointed the 27 radio telescope antennas of the Very Large Array in New Mexico at it.
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