25th anniversary: GRB 970228, a highly luminous 80-second flash of gamma rays, was detected on...
History · Anniversaries · Mon, February 28, 2022
1997: GRB 970228, a highly luminous 80-second flash of gamma rays, was detected on Earth, providing early evidence that gamma-ray bursts occur well beyond the Milky Way.
Also on Feb 28, 2022
| Date | Event | When |
|---|---|---|
| Mon, Feb 28, 2022 | 50th anniversary: Japanese police stormed a mountain lodge near Karuizawa, Nagano Prefecture, to... | 5 yr ago |
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- Wikipedia
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- Wikipedia "On this day" selected anniversary, 25 years (1997 to 2022).
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- 2026-09-25: added to 2022-02-28