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space·SpacebyCDN

A chaotic star is inching toward a violent death as astronomers watch in real-time

Every star ages, but astronomers rarely get to watch it happen in real time. Now, they've gotten a front-row seat to the aging of an unusually chaotic star — and found that it's headed toward a spectacularly violent death.

The star, located in the nearby Triangulum galaxy (also known as Messier 33), is in the middle of a transition into a class of highly unstable stars called Wolf-Rayet stars. New observations show that the star has begun beaming a new signal that was not seen when the star was first spotted in 2018.

The new signal was detected in the peaks and valleys of the star's spectra, the wavelengths of the electromagnetic radiation it emits, and shows that the star is churning either carbon or iron deep within it through nuclear fusion. The new signal also indicates that the massive star, easily 25 times the sun's mass, has inched closer to its eventual fate of exploding into a spectacular supernova.

Gaunt's team is calling the star BELLS 1, an acronym for "broad emission-lined luminous sources, the kind of wide range of emissions radiated by Wolf-Rayet stars.

According to NASA, Wolf-Rayet stars like BELLS 1 live fast and die hard, so watching one evolve is a rare and valuable opportunity for astronomers. Only 200 such stars are known to be in the Milky Way galaxy. Astronomers suspect that 1,000 or 2,000 more may be out there but are obscured by thick blankets of dust.

A chaotic star is inching toward a violent death as astronomers watch in real-timehttps://www.space.com/chaotic-star-wolf-rayet-supernovaOpen linkView original on beehaw.org
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space·SpacebyCDN

‘Golden Asteroid’ Mission Is Back On Track, Says NASA

Originally scheduled to launch in September 2022, Psyche was scrubbed last year after delays in development and testing of its flight software.

Located in the asteroid belt between Mars and Jupiter, Psyche is 140 miles/226 kilometers wide, rotates on its side and, according to its reflectivity, appears to be made largely of iron, nickel or gold. As such, planetary scientists think it could be a rare example of the core of a planet exposed to space in a cataclysmic collision.

It’s even been said that Psyche could be technically worth $10,000 quadrillion. That’s way more than the global economy, which is worth about $105 trillion in 2023 according to Statista.

Psyche is now due to launch from Kennedy Space Center’s Launch Complex 39A in Florida atop a SpaceX Falcon Heavy between Oct. 5-25, 2023, conduct a flyby of Mars for a gravity assist and arrive at the asteroid in August 2029. It will then spend 26 months in orbit, making observations from different altitudes.

Now in an Astrotech Space Operations Facility near Kennedy Space Center in Florida, the spacecraft twill this month begin its final assembly, test and launch operations.

https://www.forbes.com/sites/jamiecartereurope/2023/06/05/golden-asteroid-mission-is-back-on-track-says-nasa/?sh=6783fcc5164dOpen linkView original on beehaw.org
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