800 étoiles mystérieusement disparues intriguent les astronomes
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Some of the universe s stars have gone missing But where did they go?
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Space Mysteries: An international team of astronomers is on the hunt for objects that should be impossible.
Could the missing stars be a completely new phenomenon?
(Image credit: Tobias Roetsch)
Stars don t just vanish or do they? For thousands of years, astronomers accepted the idea that the lights in the sky were fixed and unchanging. Even when it became clear that these lights were actually physical objects like the sun, one of the key assumptions for astrophysicists has been that they go through major changes very slowly, on timescales of millions or billions of years.
And when the most massive stars of all which are many times heavier than the sun do go through sudden and cataclysmic changes as they reach the ends of their lives, their passing is marked by the unmissable cosmic beacon of a
Oddball supernova reveals star s death throes before exploding CNN 3 hrs ago By Ashley Strickland, CNN © Aya Tsuboi/Kavli IPMU This artist s illustration shows a potential stellar companion stripping hydrogen from the star that exploded into supernova 2019yvr.
Stars experience very violent lives that usually end in dazzling explosions, and scientists have tried for years to determine what happens to massive stars just before this bombastic finale.
Now, an unusual supernova is helping researchers piece more of that stellar puzzle together.
An international team of researchers used NASA s Hubble Space Telescope to observe a massive yellow star 2.5 years before it exploded in a supernova. The star was located 35 million light-years from Earth in the Virgo galaxy cluster.