According to a study led by Indian researchers, observations of a supernova discovered in a galaxy about 90.7 million light-years from Earth could help astronomers improve measurements of distances in the nearby universe.
About Supernova:
A supernova is the name given to the cataclysmic explosion of a massive star.
Supernovae (SNe) are one of the most violent explosions in the universe.
It can emit more energy in a few seconds than our sun will radiate in its lifetime of billions of years.
These spectacular events can be so bright that they outshine their entire galaxies for a few days or even months.
They’re also the primary source of heavy elements in the universe.
A star can go supernova in one of two ways:
Core-collapse supernovae (CCSNe):
These are one of these cosmic fireworks occurring when a massive star exhausts its nuclear fuel and can no longer support itself against the gravitational pull.
The most common type of core-collapse supernova is Type IIP, which happens when a massive red supergiant star (about 8–17 times the mass of the Sun) reaches the end of its life.
Process: When the star’s core collapses into a proto-neutron star, the outer material falls inward, then bounces back from the surface, creating a powerful shock wave.
When the shock reaches the surface, the star’s outer layers break away and expand into space.
Thermal runaway supernova:
It can occur when two stars orbit each other, and one or both of those stars is a white dwarf.
If the stars in one of these binary systems collide, or if one of the white dwarfs absorbs enough matter from the other star, the white dwarf can become a supernova.
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