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Why don't we know that a distant star has exploded until years later?
Wiki User
∙ 14y ago
It takes that long for the light depicting the event, to get here. If a star is 1,000 light-years away, that means it will take 1,000 years for the light depicting the event to get here. In other words, we see it as it was 1,000 years ago.
Light dosent travel to us that quickly and it's so far away that the light takes so many years or so to arrive here for us to see.
Wiki User
∙ 14y ago
When a distant star explodes, the light and other radiation from the event must travel long distances to reach Earth. This can take years or even centuries, depending on the distance of the star. Once the light reaches us and is detected by telescopes, scientists can then confirm that a star has exploded.
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