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Representative lifetimes of stars as a function of their masses The change in size with time of a Sun-like star Artist's depiction of the life cycle of a Sun-like star, starting as a main-sequence star at lower left then expanding through the subgiant and giant phases, until its outer envelope is expelled to form a planetary nebula at upper right Chart of stellar evolution
Boom.In the colossal Pinwheel galaxy, 25 million light-years away, a star has just exploded and is even visible through small telescopes. The supernova-hunting astronomer Koichi Itagaki discovered ...
Ultra-stripped supernovae occur when the exploding star has been stripped (almost) all the way to the metal core, via mass transfer in a close binary. [132] [133] As a result, very little material is ejected from the exploding star (c. 0.1 M ☉). In the most extreme cases, ultra-stripped supernovae can occur in naked metal cores, barely above ...
The findings, published on Wednesday in the journal Nature, also indicate that the giant star, located in a neighboring galaxy called Messier 101, likely left behind a black hole after it exploded.
Later in its life, a low-mass star will slowly eject its atmosphere via stellar wind, forming a planetary nebula, while a higher–mass star will eject mass via a sudden catastrophic event called a supernova. The term supernova nucleosynthesis is used to describe the creation of elements during the explosion of a massive star or white dwarf.
The James Webb Space Telescope was used to peer inside Cassiopeia A for an unprecedented look deep within the remnant of a star that exploded thousands of years ago.
When core collapse occurs in a star with a core at least around fifteen times the Sun's mass (M ☉)—though chemical composition and rotational rate are also significant—the explosion energy is insufficient to expel the outer layers of the star, and it will collapse into a black hole without producing a visible supernova outburst.
Astronomers studying the site of a supernova seen 843 years ago have captured an image of the strange filaments left behind by the stellar explosion.