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High-school student accidentally discovers black hole 'light echo' twice as wide as the Milky Way

Live Science
Summary
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79% Informative

Astronomers call these cosmic ghosts "light echoes" The object is the afterglow of a now-dormant black hole, which once spewed radiation that ionized the surrounding gas.

Julian Shapiro , 17 , pegs the light echo at about 150,000 to 250,000 light-years in diameter.

If his estimates hold up, he thinks it could be a candidate for the largest light echo ever discovered.

VR Score

88

Informative language

92

Neutral language

51

Article tone

informal

Language

English

Language complexity

55

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not offensive

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not hateful

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medium-lived

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