Open wide, baby star: Here comes a stream of gas. Astronomers observing the still-forming sun HD 142527, located about 450 light-years away, have found that it is being fed by two hidden gas giant planets several times the mass of Jupiter . The planets, which are also still forming, each live in and are obscured by their own river of gas, which flows from a large, misshapen halo on the outer edge of the system (artist's impression, above; image from Atacama Large Millimeter/submillimeter Array telescope in Chile, inset). The planets' gravity draws gas from the halo, but much of that gas overshoots them and hurtles across a vast gap toward the star instead, the team reports online today in Nature. HD 142527 is only about 2 million years old, but it's a big newborn, already twice the mass of the sun. These rivers will help it grow even more.
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