Astronomy Picture of Day: Thor's Helmet# Astronomy - 天文
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NGC 2359: Thor's Helmet
Credit: Christine and David Smith, Steve Mandel, Adam Block (KPNO Visitor Program),
NOAO, AURA, NSF
Explanation: NGC 2359 is a striking emission nebula with an impressive popular name -
Thor's Helmet. Sure, its suggestive winged appearance might lead some to refer to it as the
"duck nebula", but if you were a nebula which name would you choose? By any name NGC
2359 is a bubble-like nebula some 30 light-years across, blown by energetic winds from
Credit: Christine and David Smith, Steve Mandel, Adam Block (KPNO Visitor Program),
NOAO, AURA, NSF
Explanation: NGC 2359 is a striking emission nebula with an impressive popular name -
Thor's Helmet. Sure, its suggestive winged appearance might lead some to refer to it as the
"duck nebula", but if you were a nebula which name would you choose? By any name NGC
2359 is a bubble-like nebula some 30 light-years across, blown by energetic winds from