Astronomy Picture of Day: Outer Shells of Centaur# Astronomy - 天文
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The Outer Shells of Centaurus A
Credit: E. Peng and H. Ford (JHU), K. Freeman (ANU), R. White (STScI), CTIO, NOAO,
NSF
Explanation: What causes the surrounding shells in peculiar galaxy Cen A? Last month a
fascinating image of peculiar galaxy Centaurus A was released, processed to highlight a faint
blue arc indicating an ongoing collision with a smaller galaxy. Another interesting feature of
Cen A, however, is the surrounding system of shells, better visible here in
Credit: E. Peng and H. Ford (JHU), K. Freeman (ANU), R. White (STScI), CTIO, NOAO,
NSF
Explanation: What causes the surrounding shells in peculiar galaxy Cen A? Last month a
fascinating image of peculiar galaxy Centaurus A was released, processed to highlight a faint
blue arc indicating an ongoing collision with a smaller galaxy. Another interesting feature of
Cen A, however, is the surrounding system of shells, better visible here in