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Astronomers see white dwarf 'switch on and off' for first time
Phys.org ^ | October 18, 2021 | by Durham University

Posted on 10/18/2021 1:56:23 PM PDT by NohSpinZone

Astronomers have used a planet-hunting satellite to see a white dwarf abruptly switching on and off for the first time.

The researchers led by Durham University, UK, used NASA's Transiting Exoplanet Survey Satellite (TESS) to observe the unique phenomenon.

White dwarfs are what most stars become after they have burned off the hydrogen that fuels them. They are approximately the size of the Earth, but have a mass closer to that of the Sun.

The white dwarf observed by the team is known to be accreting, or feeding, from an orbiting companion star.

With the new observations astronomers saw it lose brightness in 30 minutes, a process only previously seen to occur in accreting white dwarfs over a period of several days to months.

The brightness of an accreting white dwarf is affected by the amount of surrounding material it feeds on so the researchers say something is interfering with its food supply.

(Excerpt) Read more at phys.org ...


TOPICS: Miscellaneous; News/Current Events
KEYWORDS: accretion; astronomy; catastrophism; physics; science; star; stringtheory; switch; tess; whitedwarf
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How physicists determine this stuff is confounding but amazing.

1 posted on 10/18/2021 1:56:23 PM PDT by NohSpinZone
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To: NohSpinZone

They were visiting the Pumpkin Patch at Roloff Farms at the time they made the discovery.


2 posted on 10/18/2021 1:59:14 PM PDT by Kickass Conservative (THEY LIVE, and we're the only ones wearing the Sunglasses.)
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To: NohSpinZone

😮


3 posted on 10/18/2021 2:03:25 PM PDT by M_Continuum
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To: Kickass Conservative

First sighting was of Danny DeVito but the second one was the genuine white dwarf.


4 posted on 10/18/2021 2:19:41 PM PDT by frank ballenger (You have summoned up a thundercloud. You're gonna hear from me. Anthem by Leonard Cohen)
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To: NohSpinZone

Astrophages...

(hat tip to Project Hail Mary by Andy Weir)


5 posted on 10/18/2021 2:30:05 PM PDT by rarestia (Repeal the 17th Amendment and ratify Article the First to give the power back to the people!)
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To: NohSpinZone

So what does this mean, exactly? I see it means the star feeds off another star but ? black hole?


6 posted on 10/18/2021 2:32:46 PM PDT by Beowulf9
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To: Beowulf9
No clue! But it make Peter Dinklage's SNL skit make more sense for some reason.


7 posted on 10/18/2021 2:34:45 PM PDT by NohSpinZone (First thing we do, let's kill all the lawyers)
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To: NohSpinZone
How physicists determine this stuff is confounding but amazing.


8 posted on 10/18/2021 2:38:27 PM PDT by Magnum44 (...against all enemies, foreign and domestic...)
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To: Beowulf9

9 posted on 10/18/2021 2:40:28 PM PDT by Magnum44 (...against all enemies, foreign and domestic...)
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To: NohSpinZone

It really is amazing.

It’s just too bad that we can’t get close enough to really see what’s going on. Too many light years away.

Yeah. I took “Physics for Poets” in college...so I, a lawyer with a Master’s degree from the University of Chicago, am an expert. LOL!

Hey. If Jill Biden with the easiest doctorate ever, is a doctor, then so am I. I do have a Juris Doctor degree. Calling her a doctor is absurd. The word means something. As in a medical doctor.


10 posted on 10/18/2021 2:52:56 PM PDT by proud American in Canada ("Fear is a reaction; Courage is a decision." Winston Churchill)
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To: NohSpinZone

11 posted on 10/18/2021 2:56:08 PM PDT by PLMerite ("They say that we were Cold Warriors. Yes, and a bloody good show, too." - Robert Conquest )
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Somehow an image of a farside cartoon conjures in my head


12 posted on 10/18/2021 2:57:24 PM PDT by dsrtsage ( Complexity is just simple lacking imaginationd)
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To: NohSpinZone

The truth is out there.


13 posted on 10/18/2021 2:59:50 PM PDT by Veggie Todd (Proudly posting comments without reading the articles since 2002.)
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To: PLMerite

Great minds...that was my first thought too :D


14 posted on 10/18/2021 3:00:17 PM PDT by Mygirlsmom (Back after a long hiatus. Now mygrandkidsgrandma)
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To: NohSpinZone

15 posted on 10/18/2021 3:08:48 PM PDT by GreenLanternCorps (Hi! I'm the Dread Pirate Roberts! (TM) Atsk about franchise opportunities in your area.)
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To: NohSpinZone
"...abruptly switching on and off..."

Isn't that Morse Code for F¥€# Joe Biden?

16 posted on 10/18/2021 3:39:56 PM PDT by skimbell
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To: NohSpinZone

Sounds like the White Dwarf star (racist?) is feeding off of the neighboring star, much like white liberals do off the working class Americans.

Movie about this White Dwarf star will be entitled “Liberal Parasites in Space”, coming to an election booth near you in November 2021 and 2022!!


17 posted on 10/18/2021 3:42:13 PM PDT by MadMax, the Grinning Reaper (Figures )
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To: NohSpinZone

They can’t pretend the Earth is round and these lights are other planetary bodies much longer.


18 posted on 10/18/2021 3:44:07 PM PDT by montag813
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To: NohSpinZone

“Astronomers see white dwarf ‘switch on and off’ for first time”

Astronomers see white dwarf ‘switch sex’ for first time

There fixed it


19 posted on 10/18/2021 3:49:43 PM PDT by antidemoncrat (somRead more at: https://economicti Astronomers see white dwarf 'switch on and off' for first time)
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To: NohSpinZone

20 posted on 10/18/2021 3:50:03 PM PDT by doorgunner69 ("Those who vote decide nothing. Those who count the vote decide everything.." -Joseph Stalin)
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