Fortunately, the telescopes were in place.
For the Earth, the explosion was bright blue, the supernova reached a million temperatures.
"That's right," said Dr. Brad Tucker, "a very, very massive event."
The astronomer of the Australian National University, Dr Tucker, was a member of some international scientists, analyzing the data and images of the explosion of stars captured by telescopes around the world for a week.
Supernovae, among the strongest explosions in the galaxy, are very rare. Astronomers knew that when they were two dwarfs, the superheavy stars around the size of our planet compressed with gravity escaped and exhausted.
But they suspected another advantage. A single white dwarf can catch a younger star, sucking his materials away. In some way, the white dwarf could not accept so much mass.
And then theorized, it exploded.
This white dwarf The fate reaffirmed the theory, Dr Tucker said.
Like a nuclear bomb, the supernova caused a great shockwave, before the same explosion in space.
By telescopes, astronomers shockwave found a star about white dwarf. Shockwave was a powerful "push for the way," says Dr. Tucker.
"It will not affect other stars, but it will mix."
Scientists will use the recording of the death of stars to learn to form and raise supernovae. There are not many unanswered questions, says Dr. Tucker.
The meeting is published on Saturday Astrophysical Journal Letters and Astrophysical Journal.
Liam Fairfax Media is a science reporter