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HD 15115

This young, yellow-white star is orbited by an asymmetric dust disk, which in the one direction stretches much further than in the other. Its maximal distance from the star is 550 AU. Possibly this strange shape was caused by a once close encounter of the now 10 light-years distant, relatively big red dwarf HIP 12545. Another possibility could be forming giant planets, which suck away dust from their environment.

Constellation: Cetus
Age: 12 million years
Distance: 150 light-years
Spectral class: F2
Visual magnitude: 7.15

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    HD 15115
The dust disk around the covered star.
Photo: NASA, ESA, and P. Kalas (University of California, Berkeley)

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