STARS

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[MrGenius]

13.53 billion year old red dwarf star(2MASS J18082002-5104378 B), in our own galaxy, is possibly the oldest star in the Universe.

http://www.sci-news.com/astronomy/ultra-metal-poor-star-06577.html

 

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Space-warping star system proves Einstein's general theory of relativity right

 

[lexluthermiester]

Space-warping star system proves Einstein's general theory of relativity right

Except that it doesn't. It only proves that the gravity effect of a mass object is warping space, which we already knew from observations(black holes anyone?). Proving General and Special relativity is another matter entirely(pun intended).

 

[Drone]

Except that it doesn't. It only proves that the gravity effect of a mass object is warping space, which we already knew from observations(black holes anyone?). Proving General and Special relativity is another matter entirely(pun intended).

No. It's not warping. It's called frame-dragging. This is the first observational evidence of white dwarf + pulsar pair frame-dragging. Frame-dragging caused by black hole will be detected in the future.

In the case of stars orbiting close to a spinning, supermassive black hole, frame dragging should cause the star's orbital plane to precess about the black hole spin axis. This effect should be detectable within the next few years via astrometric monitoring of stars at the center of the Milky Way galaxy.

 

[lexluthermiester]

No. It's not warping. It's called frame-dragging.

We can call it whatever we desire, it's still only a mass/gravity object distorting the space around it. While this might be the first occurrence where we have identified what we have observed, it doesn't prove the fundamentals of Relativity, either mathematically or in theory. It does offer a fascinating piece of the puzzle, but it's not a keystone.

 

[Countryside]

Startalk with my favourite astrophysicist Neil deGrasse Tyson and comic co-host Paul Mecurio

 

[lexluthermiester]

Here's a good one;

Kinda short, but very fasinating.

 

[EarthDog]

Kinda short, but very fasinating.

Fascinating, indeed.

I saw this a couple of days back... I had a still as my wallpaper, but... messed with my head, lol!

 

[Antykain]

Here is another vid showcasing the Inouye Solar Telescope and it's first images of the Sun..

Pretty amazing stuff!

 

[Drone]

Stellar fight

 

[Drone]

This comparison image shows the star Betelgeuse before and after its unprecedented dimming. The observations, taken with the SPHERE instrument on ESO’s Very Large Telescope in January and December 2019, show how much the star has faded and how its apparent shape has changed.

 

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R136a1 is the most massive and luminous star known to date [at 315 M☉ and 8.7 million L☉]

UY Scuti is no longer the champion of the known universe. The largest star in the universe now is Stephenson 2-18

 

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New info on Betelgeuse:

Supergiant Betelgeuse smaller, closer than first thought | Australian National University

It may be another 100,000 years until the giant red star Betelgeuse dies in a fiery explosion, according to a new study by an international team of researchers. The study, led by Dr Meridith Joyce from The Australian National University (ANU), not only gives Betelgeuse a new lease on life, but...

www.anu.edu.au

Supergiant Betelgeuse smaller, closer than first thought. It may be another 100k years until the giant explodes.
New results say Betelgeuse's radius is 750 times the radius of the Sun and distance from Earth = 530 ly.

 

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A Black Hole Triggers a Premature Supernova | www.caltech.edu

Teardrop star reveals hidden supernova doom (warwick.ac.uk)