What Is the Farthest Known Gamma-Ray Burst (GRB)?

Discover GRB 090423, the farthest known gamma-ray burst located 13 billion light-years away, shedding light on the early universe.

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The GRB 090423 is recognized as the farthest known gamma-ray burst (GRB), located about 13.035 billion light-years away. This extraordinary event provides invaluable insight into the early universe, occurring when it was less than 4% of its current age.

FAQs & Answers

  1. What is a gamma-ray burst (GRB)? A gamma-ray burst (GRB) is a highly energetic explosion observed in distant galaxies, emitting intense gamma rays and signaling extreme cosmic events like star collapses or neutron star mergers.
  2. Why is GRB 090423 considered the farthest gamma-ray burst? GRB 090423 is the farthest known gamma-ray burst because it occurred about 13.035 billion light-years away, providing a glimpse into the universe when it was less than 4% of its current age.
  3. How do scientists measure the distance to gamma-ray bursts? Scientists measure the distance to gamma-ray bursts using redshift data from afterglow observations and spectral analysis, which indicates how far the light has traveled through expanding space.

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