Monisha Ravisetti is Space.com's Astronomy Editor. She covers black holes, star explosions, gravitational waves, exoplanet discoveries and other enigmas hidden across the fabric of space and time. Previously, she was a science writer at CNET, and before that, reported for The Academic Times. Prior to becoming a writer, she was an immunology researcher at Weill Cornell Medical Center in New York. She graduated from New York University in 2018 with a B.A. in philosophy, physics and chemistry. She spends too much time playing online chess. Her favorite planet is Earth.
, the Ring Nebula is considered one of the greatest examples of a planetary nebula we have so far. One might argue, however, that"planetary nebula" is a bit of a misleading term for this light-year-wide spectacle. It has nothing to do with planets, really.are basically regions of cosmic gas and dust formed from the outer shells of dying stars, in this case a quite spherical and sun-like one.
In the middle of the whole structure lies a star on its way to its ultimate fate. It will soon become a, also known as a corpse star. White dwarfs get that grim name because they represent the final stage of stellar evolution. With its state-of-the-art army of infrared sensors, the JWST managed to obtain images that provide"unprecedented spatial resolution and spectral sensitivity" regarding all that cosmic chaos, according to ESA's statement. What this means is the spaceborne telescope, which sits about a million miles from, was able to reveal details about the Ring Nebula's intricate structure that scientists simply haven't parsed before.
"These arcs must have formed about every 280 years as the central star was shedding its outer layers," Wesson said."When a single star evolves into a planetary nebula, there is no process that we know of that has that kind of time period. Instead, these rings suggest that there must be a companion star in the system, orbiting about as far away from the central star as Pluto does from our sun.
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