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APOD30周年(2025年6月16日)
楕円銀河M87
Elliptical Galaxy M87
楕円銀河M87は、私たちの天の川銀河とは大きく異なるタイプの銀河です。しかし、楕円銀河の中でもM87は特異な存在です。M87は平均的な銀河よりもはるかに大きく、おとめ座銀河団として知られる銀河団の中心に位置し、非常に多くの球状星団が見られます。これらの球状星団は、M87の明るい中心部を取り囲むかすかな点として見えます。一般的に、楕円銀河は渦巻銀河と同程度の数の星を含みますが、楕円形（渦巻銀河はほとんどが平ら）で、渦巻き構造がなく、ガスや塵もほとんどありません。この画像は、アングロ・オーストラリア望遠鏡（AAT）で撮影された公開画像リストの60番目の画像です。
原文（English）
cal galaxy M87 is a type of galaxy that looks much different than our own Milky Way Galaxy. But even for an elliptical galaxy M87 is peculiar. M87 is much bigger than an average galaxy, appears at the center of a whole cluster of galaxies known as the Virgo Cluster, and shows a very high number of globular clusters. These globular clusters are visible as faint spots surrounding the bright center of M87. In general, elliptical galaxies contain similar numbers of stars as spiral galaxies, but are ellipsoidal in shape (spirals are mostly flat), have no spiral structure, and little gas and dust. This picture is number sixty on a publicly posted list of images from the Anglo-Australian Telescope (AAT).
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© Anglo-Australian Telescope
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Explanation:
Elliptical galaxy M87 is a type of
galaxy that looks much different
than our own
Milky Way Galaxy. But even for an
elliptical galaxy M87 is peculiar.
M87 is much bigger than an average
galaxy, appears at the center of a whole cluster of galaxies known as the
Virgo Cluster, and shows a very high number of
globular clusters.
These globular clusters are visible as faint
spots surrounding the bright center of M87. In general, elliptical galaxies
contain similar numbers of stars as
spiral galaxies, but are ellipsoidal in
shape (spirals are mostly flat), have no spiral structure, and little
gas and
dust.
This picture is number sixty on a publicly posted list of
images from the
Anglo-Australian
Telescope (AAT).
Tomorrow's picture: The Far Side
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