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There is no single answer to your question. In a sense, the explosion itself is over within a matter of seconds. But the envelope of the dying star is expelled with such speed that, when it ploughs into the interstellar gas, it is heated to millions of degrees and remain bright in X-rays for tens of thousands of years. In the visual light, how long you can track supernovae depends on their distance. Supernova 1987A in the Large Magellanic Cloud (which is relatively nearby as these things go) is still being followed from the ground and from the Hubble Space Telescope:

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Related Questions

Is Krakatoa extinct?

No. Krakatoa is an active volcano, continuing to rumble and erupt on a regular basis since its last massive explosion in 1883.


What island was the 1883 Krakatoa explosion on?

Krakatoa, or at least it was, there wasn't much left of it aferwards.


What is the most powerfull boom in the world?

I think it was the explosion of Krakatoa - a volcanic explosion.


Where did the loudest volcanic explosion which occured in 1883?

KrakatoaThe island of Krakatau (Krakatoa) is in the Sunda Strait between Java and Sumatra.


Is the Krakatau extinct?

no. Krakatoa is an active volcano, continuing to rumble and erupt on a regular basis since its last massive explosion in 1883.Read more: Is_krakatoa_extinct


The world's loudest volcanic explosion occored in 1883 was in which country when the island of Krakatoa ble itself apart?

The world's loudest volcanic explosion in 1883 occurred in Indonesia when the island of Krakatoa erupted and blew itself apart. The explosion was so powerful that it was heard over 3,000 miles away and caused massive tsunamis that devastated surrounding coastlines.


When was Krakatoa's last erruption?

1883


What was the Krakatoa haze?

The Krakatoa haze refers to the atmospheric effects caused by the eruption of Krakatoa in 1883. The explosion injected large amounts of ash and sulfur dioxide into the atmosphere, leading to colorful sunsets, cooler temperatures, and vivid twilights around the world in the following months.


What island volcanic eruption in 1883 has been called the loudest natural explosion in history?

The eruption of Krakatoa.


What was the largest known volcanic eruption in history in Indonesia?

Krakatoa is the greatest volcanic explosion recorded in Indonesia


What was the biggest volcanic explosion in the world?

Krakatoa the biggest volcanicexplosion. The explosion was so big u could hear it from Indonesia to Madagascar which happened 10 days ago


How long did it take for Krakatoa to erupt?

The Krakatoa volcano began a series of eruptions on August 26, 1883, leading to a catastrophic explosion on August 27 that devastated the surrounding areas. The eruption continued for several months, but the most powerful and destructive event occurred within a day.