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小麦哲伦星系

Also known as SMC

irregular galaxy, satellite galaxy of the Milky Way

AI overview

The Small Magellanic Cloud is an irregular galaxy that orbits our Milky Way as one of its satellite galaxies. It matters to astronomers because studying it helps us understand galaxy formation and evolution, as well as the structure and history of our own galactic neighborhood.

AI-generated from the Wikipedia summary — may contain errors.

Wikidata facts

Instance of: astrophysical X-ray source
Has part: NGC 330
Named after: Ferdinand Magellan
Constellation: Tucana
Child body: NGC 265
Distance from Earth: 62
Radius: 7000
Image: SMC - Noirlab2030b.jpg

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Commons category: Small Magellanic Cloud
catalog code: 3FGL J0059.0-7242e
galaxy morphological type: dIrr
topic's main category: Category:Small Magellanic Cloud
time of discovery or invention: 1521-00-00
discoverer or inventor: Ferdinand Magellan
apparent magnitude: 2.2
absolute magnitude: -16.2
redshift: 0.000527
right ascension: 13.15833
declination: -72.80028
radial velocity: 145.6
epoch: J2000.0
metallicity: -1.07
short name: MMO
right ascension component of proper motion: 0.772
declination component of proper motion: -1.117

Sources (2)

via Wikidata · CC0

Article · 中文

小麥哲倫星系（SMC）是一個環繞著銀河系的矮星系，擁有數億顆的恆星。推測小麥哲倫星系原本是棒旋星系，因為受到銀河系的擾動才成為不規則星系，但在核心仍殘留著棒狀的結構。在20萬光年距離上的小麥哲倫星系是最靠近銀河系的鄰居之一，也是裸眼能看見的最遙遠天體之一。他位於杜鵑座，在夜空中看似模糊的光斑，大小約為3゜，由於平均的赤緯是 -73゜，所以只能在南半球和北半球的低緯度地區看見。他看似銀河系被分割的一個片段，由於很低，要在黑暗的環境下才能看得清楚。他與在東方20゜的大麥哲倫星系成為一對，都是本星系群的成員。

Abstract from DBpedia / Wikipedia · CC BY-SA

小麦哲伦星系

Wikidata facts

Article · 中文

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