Every year,two or three supernovae are seen within our own Galaxy.
Correct Answer:
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Q2: Because light cannot escape from a black
Q3: In 1054,the imperial astronomer to the Chinese
Q4: In general,a Type Ia supernova is brighter
Q5: Type Ia supernovae are generally brighter than
Q6: After the core collapse and bounce in
Q8: A Type Ia supernova is thought to
Q9: When a star becomes a black hole,its
Q10: Supermassive black holes are generally thought to
Q11: In general,an isolated pulsar speeds up as
Q12: A supergiant star can keep adding shells
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