Physicist’s magnetic device discovered saltwater ocean on Europa Moon (the smallest of the four Galilean moons orbiting Jupiter). The data has collected Margaret Kivelson and…
NASA’s Fermi telescope has detected gamma rays produced by the shattered husk of Tycho’s supernova which has been exploded in 1572. This may allow for researching the origin of cosmic gamma rays, super-speedy subatomic particles that crash constantly into Earth’s atmosphere. The Tycho’s supernova is located 10,000 light-years away from the Earth in the constellation Cassiopeia has exploded in November 1572 and remained visible in the sky for about 15 months. The supernova was named after the astronomer, Tycho Brahe, who has been performing the research. The behavior of the supernova star has changed understanding of the universe, which at that time was considered as a fixed, unchanging part of the universe.
However, it is still unknown where and how cosmic rays, most of which are protons, attain their incredible speeds and energies. Charged particles are easily deflected by interstellar magnetic fields which makes almost impossible to trace them back to their sources. But astronomers believe that the exploded supernova may answer these questions. After the Tycho supernova star’s boom, it becomes a rapidly expanding shell of hot gas bounded by the explosion’s shock wave. Magnetic fields on either side of the shockwave trap particles, bouncing them back and forth in a high speed. These particles generate energy with each bounce, eventually getting so amped up that they burst free of the magnetic fields and start zipping through interstellar space. The new gamma-ray detection in Tycho’s supernova star allows for understanding that some protons are accelerated to near light speed within the remnant of the supernova, then smashing into other, slower-moving particles. These collisions produce the gamma rays detected by NASA’s Fermi telescope. Following the find, scientists assume that many younger remnants, such as Tycho, are seen to generate more high-energy gamma rays than older remnants.