简明释义：
He notes it could be part of the Sagittarius stream, a remnant of the Sagittarius dwarf galaxy, long assumed to be one of the building blocks of our own Milky Way.
FORBES: Astronomers Confirm Milky Way's Most Distant Stellar Stream
Sagittarius a is now agreed to be the most plausible candidate for the location of a supermassive black hole at the center of the Milky Way galaxy.
现在同意人马座a是银河系中心超大质量黑洞位置的最有可能的候选者。
It's called the Sagittarius dwarf galaxy.
这就是所谓的人马座矮星系。
词典短语
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sagittarius dwarf irregular galaxy
人马座矮不规则星系
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Sagittarius dwarf spheroidal galaxy
人马座矮椭球星系
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人马矮星系 ; 人马座矮星系 ; 从人马矮星系 ; 人马座矮椭球星系
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Sagittarius Dwarf Elliptical Galaxy
人马座矮椭球星系