Pluto-like Objects Turn to Dust Around a Nearby Young Star
ALMA image of the dust surrounding the star HD 107146. Credit: L. Ricci ALMA (NRAO / NAOJ / ESO); B. Saxton (NRAO / AUI / NSF)
A planetary system’s early days readily tell of turmoil. Giant planets are swept from distant birthplaces into sizzling orbits close to their host star. Others are blasted away from their star into the darkness of space. And smaller bodies, like asteroids and comets, are being traded around constantly.
Astronomers using the Atacama Large Millimeter/submillimeter Array (ALMA) have seen the latter: swarms of Pluto-size objects turning to dust around a young star. And the image is remarkable.
“This system offers us the chance to study an intriguing time around a young, Sun-like star,” said coauthor Stuartt Corder and ALMA Deputy Director in a news release. “We are possibly looking back in time here, back to when the Sun was about 2 percent of its current age.”
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© Shannon Hall for Universe Today, 2014. |
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Source: http://www.universetoday.com/117340/pluto-like-objects-turn-to-dust-around-a-nearby-young-star/
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