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MisdemeanorRebel
2020 Jan 22, 11:25am
MisdemeanorRebel
2020 Jan 22, 11:25am
This is what the star Betelgeuse exploding would look like from Earth.
— Wonder of Science (@wonderofscience) January 6, 2020
Credit: NHK/Cosmic Front pic.twitter.com/PHJha8NJld
2
HeadSet
2020 Jan 22, 2:36pm
HeadSet
2020 Jan 22, 2:36pm
The light from Betelgeuse is 640 years old. It may have already supernova-ed.
If it goes supernova today we can see it in 640 years.
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No shit, Sherlock! The gravity waves being observed also started out 650 years go. That is, we are seeing indications that the star may have gone nova 650 years ago, and we may see the supernova "today" or sometime soon.
If it goes supernova today we can see it in 640 years.
...
No shit, Sherlock! The gravity waves being observed also started out 650 years go. That is, we are seeing indications that the star may have gone nova 650 years ago, and we may see the supernova "today" or sometime soon.
3
georgeliberte
2020 Jan 22, 3:08pm
georgeliberte
2020 Jan 22, 3:08pm
A clear sign of stellar warming. Reduce your Hydrogen signature.
4
Shaman
2020 Jan 22, 3:29pm
Shaman
2020 Jan 22, 3:29pm
Whew! 650 light years is enough by a bunch so we don’t get fried. Usually the disaster range is 100 light years or so.
There’s been serious speculation that life, especially advanced life, is only possible in the shadowed edges of the galaxy because the core contains too many stars, some of which will be going supernova at a decent rate. Those supernovas will “cleanse” nearby worlds with radiation. It could explain why the galaxy seems like such a quiet place.
There’s been serious speculation that life, especially advanced life, is only possible in the shadowed edges of the galaxy because the core contains too many stars, some of which will be going supernova at a decent rate. Those supernovas will “cleanse” nearby worlds with radiation. It could explain why the galaxy seems like such a quiet place.
5
indc
2020 Jan 22, 4:59pm
HEYYOU says
Gravitational waves also travel at speed of light.
The light from Betelgeuse is 640 years old. It may have already supernova-ed.
If it goes supernova today we can see it in 640 years.
...
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Gravitational waves also travel at speed of light.
Betelgeuse has been grabbing a few headlines lately, as the normally bright star dimmed to its lowest point ever recorded — and astronomers don't exactly know why.
Now the U.S.-based Laser Interferometer Gravitational-Wave Observatory (LIGO) has detected a gravitational wave coming from that direction, adding another intriguing detail to what's happening.
The first gravitational wave ever recorded — a powerful ripple through space-time caused by cataclysmic events, like two merging black holes — was detected in September 2015.
https://www.cbc.ca/news/technology/betelgeuse-gravitational-wave-1.5433653
If Betelgeuse goes supernova, it will be as bright as the full moon and cast shadows on the Earth.