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(Image from article: "Mega-star explosion most distant object ever seen")

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Billions needed for asteroid defense?

If scientists detected a major asteroid headed for Earth now, it would take at least five years and billions of dollars to develop an effective defense system to either alter its course or destroy it, scientists say.

Mega-star explosion most distant object ever seen

It took 13 billion years to reach Earth, but astronomers have seen the light of an exploding mega-star that is the most distant object ever detected, two studies published Thursday reported.

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