00:00 On October 9, 2022, the European Space Agency's Integral Space Telescope, designed to monitor
00:07 daily gamma-ray bursts, detected a cosmic phenomenon named GRB 221009A.
00:15 This event, originating nearly two billion light-years away, set a new standard for brightness
00:21 in gamma-ray bursts, with experts describing it as "probably the brightest ever recorded."
00:28 The magnitude of GRB 221009A surpassed its closest competitor by tenfold, an occurrence
00:36 expected only once every 10,100 years.
00:40 The colossal burst from GRB had tangible effects on Earth.
00:43 Lasting for 800 seconds, the gamma rays triggered lighting detectors in India showcasing the
00:49 immense energy unleashed.
00:51 Simultaneously, instruments in Germany recorded several hours of disturbance in Earth's
00:56 ionosphere, a plasma-rich layer from 50 km to 950 km above the planet.
01:02 This disturbance is comparable to the effects of a major solar flare, affecting the ionosphere's
01:08 lowest layers.
01:10 The China's CESMO electromagnetic satellite, CSES, launched in 2018 and monitored electromagnetic
01:17 changes in the ionosphere played a pivotal role in confirming the impact of GRB 221009A.
01:25 Members of the CSES science team observed an intense perturbation in the topside ionosphere
01:33 marked by a strong electric field variation, a phenomenon never witnessed before.
01:38 This groundbreaking discovery emphasized that cosmic events, even billions of light-years
01:43 away, can have miserable consequences on Earth.
01:48 Laura Hayes, a research fellow and solar physicist at ESA, noted that the disturbance caused
01:54 by GRB impacted the ionosphere in a manner akin to major solar flares.
02:01 Such disturbances could have broader implications as hinted by the team's speculation on the
02:07 dire consequences of a similar gamma ray burst occurring within our galaxy.
02:12 The potential damage to the ozone layer and the risk of harmful ultraviolet radiation
02:17 reaching Earth's surface are concerns that warrant further investigations.
02:23 Gamma ray bursts, GRBs, are high-energy electromagnetic radiation emissions and GRB 221009A stands
02:31 out as the most powerful explosion ever detected in the universe.
02:37 NASA describes GRBs as the most powerful class of explosions, ranking among the most luminous
02:44 events known.
02:46 Originating from the direction of the Sagittar constellation, astronomers believe GRB 221009A
02:54 resulted from the birth of a black hole caused by a supernova, a process wherein a dying
02:59 star's core gives rise to a black hole, producing powerful jets of particles and consequently
03:06 X-rays and gamma rays.
03:08 This extraordinary cosmic event traveling to Earth over almost 1.9 billion years opens
03:14 new avenues for understanding the dynamic nature of the universe.
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