The accident, which took place more than 400 miles above the earth's surface on Tuesday, has left a large cloud of debris drifting in space.
这场于周二在地球400英里的上空发生的事故，留下了大量漂浮的碎片。
These X-ray pulses take 300 years to traverse the distance between the central black hole and a large cloud known as Sagittarius B2, so the cloud responds to events that occurred 300 years earlier.
这些X射线脉冲花了300年从中心黑洞到达了一片巨大的云团人马座B2，于是云团对300年前的事件作出反应。
These X-ray pulses take 300 years to traverse the distance between the central black hole and a large cloud known as Sagittarius B2, so the cloud responds to events that occurred 300 years earlier.
这些X射线脉冲花了300年从中心黑洞到达了一片巨大的云团人马座B2，于是云团对300年前的事件作出反应。
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