Maybe you saw it in today's news: astronomers have broken the record for the farthest thing ever seen. It's the gamma-ray burst GRB 090423, seen to happen last April 23rd in Leo, with a redshift of about 8.1. That means its light has been travelling through expanding space for 13.1 billion years, and that the burst took place 630 million years after the Big Bang.
The fading infrared afterglow of GRB 090423 is circled in this infrared image taken with the Gemini North Telescope in Hawaii last April. The burst was the farthest, earliest cosmic explosion yet seen.
Gemini Observatory / NSF / AURA / D. Fox / A. Cucchiara / E. BergerIf that sounds familiar, it's because we reported the news last April; read it here. The journal Nature issued a press release about it today, which is why it's being treated as if it were breaking news
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