Looks like this red giant, Betelgeuse, may be nearing Nova?
#1
Looks like this red giant, Betelgeuse, may be nearing Nova, 'course, if it does, it already has, since is quite a few light-years away. Scientists are becoming more inclined to believe it will nova and signs are increasingly pointing to that outcome. January has seen even more significant changes in brightness than in months past.

Here's the latest:


Keyboard Warrior


SpaceWeather.com Article Wrote:Link to sharable article below...

HE FAINTING OF BETELGEUSE: One day, perhaps in our lifetimes, perhaps a million years from now, the red giant Betelgeuse will dim a little–and then explode. The resulting supernova will rival the full Moon and cast shadows after dark, completely transforming the night skies of Earth. No wonder astronomers are closely tracking the current "fainting of Betelgeuse."

"Fainting" is an actual astronomical term. It means dimming, the opposite of brightening. And right now, Betelgeuse is definitely fainting.

[Image: Brian-Ottum-Betelgeuse_Fainting_4x4_date..._strip.gif]
Above: Betelgeuse photographed by Brian Ottum of Animas, New Mexico, 4 years apart: more.
Edward Guinan of Villanova University and colleagues caused a sensation among astronomers last month when they reported "[Betelgeuse] has been declining in brightness since October 2019, now reaching a modern all-time low of V = +1.12 mag on 07 December 2019 UT. Currently this is the faintest the star has been during our 25+ years of continuous monitoring."

Little did they know when they issued their telegram in December that Betelgeuse was about to become even fainter. “On 06 January 2020 UT, the magnitude of Betelgeuse was V = +1.37,” reports Guinan. That’s ~20% dimmer than the "modern all-time low" registered the month before.

This 3-year plot of the Villanova team’s data shows Betelgeuse’s rapid decline:
[Image: magnitudes_strip.png]
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.

Astronomers have long known that Betelgeuse is on the precipice of an energy crisis. It's about to run out of fuel in its core. When that happens, the star will collapse and rebound explosively, producing the first bright supernova in the Milky Way since 1604. Experts in stellar evolution believe Betelgeuse could die at any time during the next million years–a blink of an eye on time scales of astronomy.

Does the current dimming herald that final blast? Probably not. Betelgeuse is a slowly variable star, and this is probably no more than an episode of deeper-than-usual dimming. Of course, one day astronomers will think the same thing … and then the night sky will change forever.

A sharable version of this story is available here.
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#2
This could be an amazing site if it in fact is going super nova! The star has definitely been much dimmer through my telescope.
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#3
Update: Now there are reports of "Gravity Waves" coming from the direction of this star.

Looks like this subject is gettin' some legs:


Keyboard Warrior


Article Wrote:Link to Original Article Page

It’s probably nothing: Gravitational wave burst detected near Betelgeuse | EarthSky.org



Betelgeuse has dimmed recently, prompting some to wonder if it’s about to explode. An explosion might trigger a gravitational wave burst. Betelgeuse is still there. The nearby gravitational wave burst probably means nothing for this star. Still …

[Image: gravitational-waves-LIGO-artist.jpg]

Gravitational waves are “ripples” in space-time caused by some of the most violent and energetic processes in the universe. Image via LIGO.


The Laser Interferometer Gravitational-Wave Observatory (LIGO) and Virgo detectors recorded a “burst” of gravitational waves this week, from an area of sky near the red supergiant Betelgeuse. This unanticipated burst has been dubbed, for now, S200114f. It’s prompting some interesting chatter on Twitter because Betelgeuse has undergone an unusual dimming in recent weeks, and some astronomy enthusiasts have wondered if it were about to explode. Betelgeuse has not exploded. It’s still there. Still, a supernova explosion of Betelgeuse might be linked with a gravitational wave burst.

As Jackson Ryan explained on CNET last night (January 14, 2020):
Quote:The gravitational waves we’ve detected so far usually relate to extreme cosmic events, like two black holes colliding or neutron stars finally merging after being caught in a death spiral. Burst gravitational waves have not been detected before and scientists hypothesize they may be linked to phenomena such as supernova or gamma ray bursts, producing a tiny ‘pop’ when detected by the observatories.

Astronomer Andy Howell at Las Cumbres Observatory leads a group that studies supernovae and dark energy. He posted some especially informative tweets about Betelgeuse last night.

As Andy said in one of the tweets above, gravitational wave detectors do sometimes detect false positives, about once every 25 years. So that is something to keep in mind.
The most important thing to keep in mind is that Betelgeuse has not exploded. Estimates suggest it won’t explode in our lifetimes … probably.

What’s so great here is the way that astronomers – some of Earth’s most curious people – have reacted, turning their attention and their telescopes toward Betelgeuse and toward the region of the sky from which the gravitational waves apparently originated. What is going on? The verdict isn’t in yet. Probably nothing. Still, many on Twitter last night spoke of going outside to look at Betelgeuse. Their enthusiasm and excitement are contagious!

[Image: betelgeuse-comparison-2016-12-31-2019-Br...02807.jpeg]
View at EarthSky Community Photos. | Brian Ottum kindly provided this direct comparison of Betelgeuse a few years ago, and Betelgeuse in recent weeks.

You can see that the star has dimmed noticeably. Brian wrote: “Left is February, 2016. Right is December 31, 2019. Note that the brightness/appearance of all background stars are identical left versus right, but Betelgeuse is definitely fainter on the right.” Thank you, Brian!

Bottom line: The LIGO and Virgo detectors this week recorded a “burst” of gravitational waves, from an area of sky near the red supergiant Betelgeuse, which has recently undergone a mysteriously dimming. Hmmmmmm.

[Image: 96.jpg]
Deborah Byrd created the EarthSky radio series in 1991 and founded EarthSky.org in 1994. Today, she serves as Editor-in-Chief of this website. She has won a galaxy of awards from the broadcasting and science communities, including having an asteroid named 3505 Byrd in her honor. A science communicator and educator since 1976, Byrd believes in science as a force for good in the world and a vital tool for the 21st century. "Being an EarthSky editor is like hosting a big global party for cool nature-lovers," she says.
One should have an open mind; open enough that things get in, but not so open that everything falls out
Art Bell
 
The individual is handicapped by coming face to face with a conspiracy so monstrous that he cannot believe it exists.
J Edgar Hoover

 
I don't need a good memory, because I always tell the truth.
Jessie Ventura

 
Its no wonder truth is stranger than fiction.
Fiction has to make sense
Mark Twain

If history doesn't repeat itself, it sure does rhyme.
Mark Twain
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