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SpaceNut

Administrator

From: New Hampshire

Registered: 2004-07-22

Posts: 29,431

Re: Supernova and Gamma Ray Bursters - Nearby Stellar Explosion Dangers

Nice use of the way back machines.
We may be able to see this firsthand as the sunspots get ready to erupt.

Mars_B4_Moon

Member

Registered: 2006-03-23

Posts: 9,776

Re: Supernova and Gamma Ray Bursters - Nearby Stellar Explosion Dangers

Does Betelgeuse Even Rotate? Maybe Not

https://www.universetoday.com/164602/do … maybe-not/

Mars_B4_Moon

Member

Registered: 2006-03-23

Posts: 9,776

Re: Supernova and Gamma Ray Bursters - Nearby Stellar Explosion Dangers

Amaterasu, when they tried to trace the particle back to its origin in space, they were unsuccessful.

Researchers believe the particle must have come from relatively nearby, cosmically speaking, as otherwise it would likely interacted or have collided with something in space and lost energy.

'Where Did the Amaterasu Particle Come From?'
https://arxiv.org/abs/2312.13273

The most straightforward option is that Amaterasu was created in a transient event in an otherwise undistinguished galaxy.

Mars_B4_Moon

Member

Registered: 2006-03-23

Posts: 9,776

Re: Supernova and Gamma Ray Bursters - Nearby Stellar Explosion Dangers

between constellation Hercules and Bootes for those who look at the Nightsky and find your way by classical Constellations

Cosmic explosion will be visible to the naked eye in once-in-a-lifetime stargazing event
https://www.nbcnews.com/science/space/n … rcna144511

A rare cosmic eruption is expected to occur in the Milky Way in the coming months — an outburst so bright that a “new” star will seemingly appear for a short time in the night sky.

The event, known as a nova, will be a once-in-a-lifetime skywatching opportunity for those in the Northern Hemisphere, according to NASA, because the types of star systems in which such explosions occur are not common in our galaxy.

The stellar eruption will take place in a system called T Coronae Borealis, which is 3,000 light-years away from Earth. It contains two stars: a dead star, also known as a “white dwarf,” closely orbited by a red giant. Red giants are dying stars that are running out of hydrogen fuel in their cores; the sun in our solar system will eventually become one, according to NASA.

In systems like T Coronae Borealis, the two stars are so near to each other that matter from the red giant is constantly spilling onto the surface of the white dwarf. Over time, this builds up pressure and heat, eventually triggering an eruption.

“As matter accumulates on the surface of the white dwarf, it heats up and you get higher and higher pressure until bang — it’s a runaway reaction,” said Bradley Schaefer, a professor emeritus of physics and astronomy at Louisiana State University.

He likened the nova explosion to a hydrogen bomb detonating in space, adding that the resulting fireball is essentially what people will be able to see from Earth. (A nova is different from a supernova explosion, which occurs when a massive star collapses and dies.)

At its peak, the eruption should be visible to the naked eye, Schaefer said: “It’s going to be bright in the sky, so it’ll be easily visible from your backyard.”

Astronomers predict that the nova explosion could happen anytime between now and September. The last time this particular star system erupted was in 1946, Schaefer said, and another eruption will likely not occur for another 80 years or so.

Mars_B4_Moon

Member

Registered: 2006-03-23

Posts: 9,776

Re: Supernova and Gamma Ray Bursters - Nearby Stellar Explosion Dangers

not dangerous but the brightest GRB ever observed

The Brightest Gamma Ray Burst Ever Seen Came from a Collapsing Star
https://www.universetoday.com/166620/th … sing-star/