The US National Aeronautics and Space Administration (NASA) announced on Monday that it has discovered the youngest black hole known to exist in our cosmic neighborhood.
美国宇航局日前发现一个地球附近最为年轻的黑洞。
The US National Aeronautics and Space Administration (NASA) announced on Monday that it has discovered the youngest black hole known to exist in our cosmic neighborhood.
美国宇航局日前发现一个地球附近最为年轻的黑洞。
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