Mystery Planets Drift Through Space
NASA?s Hubble Space Telescope has spotted planet-sized objects wandering through space. What?s unique about them is that they?re loners, with no central star of their own.
The lone planets were discovered when Kailash Sahu, of the Space Telescope Science Institute, and his colleagues monitored 83,000 stars in part of our Galaxy. The planets are too dim and small to be seen directly by Hubble, but could be detected by the way their gravitational fields bent and amplified the light from distant background stars.
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