红巨星难道是在某天早晨醒来后忽然决定进行超新星爆发？
Does a red giant wake up one morning and suddenly just decide to go supernova?
超新星爆发后留下了一个直径12.5英里的致密核心，NASA的钱德拉X射线天文台于1999年第一次观察到了这一核心。
The supernova left behind a dense central core 12.5 miles wide that was first spotted in 1999 by NASA's Chandra X-ray Observatory.
超新星爆发后留下了一个直径12.5英里的致密核心，NASA的钱德拉X射线天文台于1999年第一次观察到了这一核心。
The supernova left behind a dense central core 12.5 miles wide that was first spotted in 1999 by NASA's Chandra X-ray Observatory.
应用推荐