The supernova explosion is a very violent celestial event that usually occurs at the end of a star's life cycle. It releases so much energy which can even outshine entire galaxies for a short time. The "shock breakout" is the earliest electromagnetic radiation event following a supernova...
The light from its explosion reached Earth about 350 years ago, around the time of Isaac Newton. “This particular object is very important because it’s relatively nearby and it’s young, so what you see is a frozen-in-time picture of how the star blew up,” says Dartmouth College ...
This supernova is classified as a Type Ia, a special kind of stellar explosion that occurs when the core of a dead star reignites and detonates. Type Ia supernovae are valuable to astronomers because they serve as reliable cosmic yardsticks. They are believed to have a consistent intrinsic ...
So not only do we now know that there definitely was a SN explosion in Earth's vicinity about 2.5 million years ago, we also have the very first detection of the unstable 55Mn isotope. This figure from the study shows the merged data from all four sampling areas. The C/C0 on the...
the calcium in our bones and the silicon in the rocks beneath our feet. These exploding stars also influence the birth of new stars and are the source of the energetic cosmic rays that irradiate us on the Earth. The prodigious amount of energy (∼1051, or∼2.5 × 1028 megatonnes of...
Highly energetic UV, X-ray and gamma radiation delivers the first wallop, and the second comes from swarms of charged particles called cosmic rays that are accelerated to tremendous speeds by the explosion. This combo can damage Earth's ozone layer for 100,000 years or so, study team members...
The researchers think that only within the 2-3 years prior to its supernova explosion, the star had been pouring out dust amounting to tens of thousands of times the mass of the Earth, creating a particle shell several billion kilom...
The strikingly bright shock waves from a massive star explosion first observed in 1987 can still be seen today, three decades later. This brilliant star explosion, called Supernova 1987A, occurred only 160,000 light-years from Earth in a satellite galaxy of the Milky Way known as the Large...
“This could come from the exotic elements sourced from the explosion and present in trace amounts in the sedimentary record.” Dino-killing asteroid Celestial events have triggered at least one mass extinction, according to scientific evidence. A city-size asteroid slammed into Earth off the ...
It is shown that by taking the effect of the Earth into account the possible observation of electron neutrinos from the supernova SN1987A at the Kamiokande II is compatible with the solution of the solar neutrino puzzle by the Mikheyev-Smirnov-Wolfenstein mechanism. Our scenario requires ...