aufbahrung wrote:I know there's the inverse square law and radiation falls off quickly. The stars surrounding a supernova ain't gonna be that effected by the intervening vacuum. I'm not talking end of the world, only frying the electronics of crap TV station satellites etc. Think it might be interesting to review what I said after the supernova appears, if that is possible. You can then continue to scoff or stand back in stunned silence that I got something right.

You still haven't defined what you meant by "the previous supernova". Care to try?

After which "supernova appears" are you writing about now? Betelgeuse or something closer but still more than 50 light-years away?

It's almost disorienting now to look up and see that Aldebaran is now the brighter of the two red stars in that part of the sky.

I don't have anything important to add. I just feel the need to correct the thread title. It's spelled, "Beetlejuice."

Spinozasgalt wrote:I don't have anything important to add. I just feel the need to correct the thread title. It's spelled, "Beetlejuice."

Now say it three rimes.

I haven't watched the movie so I don't know what happens next. I just wanted to be a part of things.

Spinozasgalt wrote:I don't have anything important to add. I just feel the need to correct the thread title. It's spelled, "Beetlejuice."

What are you trying to spell?

The topic title refers to the name given to a member of the constellation Orion that derives from the Arabic for armpit, or hand, of Orion. Otherwise, this disambiguation page may apply.

I DON'T KNOW. I will leave quietly, just stop throwing eggs at me. Please.

Poor Jenny...it’s like the time I deliberately used the word “racialist” in a conversation with my brother-in-law, and he thought he had finally caught the naughty atheist in an error. And do you know, I never even defended myself. Props, Jen.

via Sean Carroll

12 tips for physicists who want to talk to biologists, and 13 tips for biologists who want to talk to physicists. (It takes more tips to talk to physicists, and #13 is the best.)
https://www.nature.com/articles/d41586-019-03961-y
https://www.nature.com/articles/d41586-019-03960-z

https://pbs.twimg.com/media/ENnfz0bU0AA ... name=small

Image won't load here but #13 is the best.

Edit for attribution.

... and so it continues:

story continues at today's spaceweather.com

...
The horizontal axis is Heliospheric Julian Date (HJD). For reference, Jan. 6, 2020, the date of the most recent measurement, has an HJD of 2458855.

The fainting is easy to see with the naked eye. Not long ago, Betelgeuse was the 10th brightest star in the sky. Now it is the 21st. Observers of Orion rising in the east after sunset can’t help but notice that the Hunter’s shoulder is dimmer than it used to be.
...

I recall a astronomy geek in my dungeans and dragons group back in the 80s saying it'd gone dim and was getting ready to blow....been here before. Close but no cigar...

It's now the dimmest since well before the 80s.


Graph from SkyandTelescope article, "What’s Up With Betelgeuse?"

newolder wrote:... and so it continues:

story continues at today's spaceweather.com

...
The horizontal axis is Heliospheric Julian Date (HJD). For reference, Jan. 6, 2020, the date of the most recent measurement, has an HJD of 2458855.

The fainting is easy to see with the naked eye. Not long ago, Betelgeuse was the 10th brightest star in the sky. Now it is the 21st. Observers of Orion rising in the east after sunset can’t help but notice that the Hunter’s shoulder is dimmer than it used to be.
...

GAH! I should be excited about being able to witness stellar evolution with the unaided eye. I should be excited about the chance that it'll go supernova.

Instead, I find myself stressed out about going out after sunset and seeing Orion rise with Betelgeuse looking almost as dim as Bellatrix. It's undeniably irrational, and yet I'm irritated. It's akin to seeing a favorite tree losing a branch. I might as well admit, that with everything else going on, I've found myself having to suppress irrational musings about its being a harbinger of some kind.

Perhaps this page listing the currently active and other recent supernovae, will help restore some calm?

With the huge number of galaxies in the cosmos, stars go pop all the time somewhere or other. Harbingers of data for modellers is the worst that happens, unless one's planet is within a few 10s of light years, or so.

What is the risk range for a middling size supernova?

Just curious and too lazy to look it up.

The latest Astronomer's telegram on The Continued Unprecedented Fading of Betelgeuse notes that the current best guess is the dimming should reverse by the beginning of February...

...
If these recent light changes are due to an extra-large amplitude light pulse on the ~420-day period, then the next mid-light minimum is expected during late January/early February, 2020. If Betelgeuse continues to dim after that time then other possibilities will have to be considered. The unusual behavior of Betelgeuse should be closely watched.

Star might have exhausted its lighter gases, still needs time to build up towards producing iron where the supernova occurs. That might be a century or more. I'm not expecting anything to happen soon. Keep a eye on it, though. Could be next week. I've been wrong before.

aufbahrung wrote: I've been wrong before.

Shut the front door!