仙后座a的核心是迄今为止发现的最年轻的中子星。这一发现发表在了本周三的《自然》杂志上。
Published Wednesday in Nature, the findings make Cassiopeia's core the youngest neutron star scientists have ever encountered.
直到仙后座移动到北极星的上方，猎户座才会升起。
Orion won't rise until Cassipeia swings above Polaris, the North Star.
直到仙后座移动到北极星的上方，猎户座才会升起。
Orion won't rise until Cassipeia swings above Polaris, the North Star.
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