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Nearby star may be swarming with comets

发布时间:2018-01-09 01:01:11来源:未知点击:

A GIANT ring of debris around a nearby star appears to be a much bigger version of our solar system’s Kuiper belt, the region of ice-rich objects beyond Neptune that is thought to be a source of comets. A team led by Christine Chen of the Space Telescope Science Institute in Baltimore, Maryland, used the orbiting Spitzer Space Telescope and the Gemini South telescope in Chile to study infrared light from the disc around HD 181327, which lies about 150 light years from Earth. They saw a peak in brightness at a wavelength of around 63 micrometres,