Gamma ray burst or hyperenergetic supernova near earth (26 дек 500000000 г. – 25 март 600000000 г.)
Описание:
Estimated time until a gamma ray burst, or massive, hyperenergetic supernova, occurs within 6,500 light-years of Earth; close enough for its rays to affect Earth's ozone layer and potentially trigger a mass extinction, assuming the hypothesis is correct that a previous such explosion triggered the Ordovician–Silurian extinction event. However, the supernova would have to be precisely oriented relative to Earth to have any negative effect.Добавлено на ленту времени:
Дата:
26 дек 500000000 г.
25 март 600000000 г.
~ 5883516 years
