Could Alpha Centauri be made of anti-matter?Experimental observation of matter/antimatter in the universeAre there experiments taking place right now that might show evidence for or falsify dark energy or dark matter?Matter vs. Antimatter shortly after Big BangWhat effects would a finding of Gravitational Repulsion Between Matter and Anti-Matter in the ALPHA Experiment have on Mainstream Theory?Could dark matter possibly be anti-matter?If all the Structure in our visible Universe originated from Quantum Fluctuations, why isn't there as much Anti-Matter as Matter?Is it possible for the Oort cloud to account for the Dark Matter issue?Can there be a black hole as big as the space between any two neighbor stars?Is it possible to transform energy stored in anti-matter into coherent radiation?
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Could Alpha Centauri be made of anti-matter?
Experimental observation of matter/antimatter in the universeAre there experiments taking place right now that might show evidence for or falsify dark energy or dark matter?Matter vs. Antimatter shortly after Big BangWhat effects would a finding of Gravitational Repulsion Between Matter and Anti-Matter in the ALPHA Experiment have on Mainstream Theory?Could dark matter possibly be anti-matter?If all the Structure in our visible Universe originated from Quantum Fluctuations, why isn't there as much Anti-Matter as Matter?Is it possible for the Oort cloud to account for the Dark Matter issue?Can there be a black hole as big as the space between any two neighbor stars?Is it possible to transform energy stored in anti-matter into coherent radiation?
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margin-bottom:0;
$begingroup$
How can we tell if a star is made of matter or anti-matter? For example, is there any difference spectroscopically? Or could we tell from cosmic rays?
If half of the stars were made of matter and half of anti-matter, then they would be in balance.
After the Big Bang, the slightest of imbalances in the distribution of matter and anti-matter would, I think, grow more pronounced as a local surplus of matter would persist if bombarded with equal amounts of matter and anti-matter. Over time, that matter would gravitationally come together and locally grow more dense. Gravitation thus would segregate matter and anti-matter as most of space became empty. Thus perhaps half the stars that we see might be made of anti-matter. For the photons they produce would be the same, yes? And the gravitational force is the same.
In particular, I wish to know approximately what is the density of mass in the space midway between our solar system and Alpha Centauri? What would be the nature and magnitude of energy released there if matter from our side was colliding with anti-matter from Alpha Centauri's side? Would we be able to detect that? Please, I would like to see a calculation! Thank you.
universe spectroscopy antimatter stars cosmic-rays
asked 9 hours ago
Andrius KulikauskasAndrius Kulikauskas
465 bronze badges
$endgroup$
|
show 1 more comment
$begingroup$
How can we tell if a star is made of matter or anti-matter? For example, is there any difference spectroscopically? Or could we tell from cosmic rays?
If half of the stars were made of matter and half of anti-matter, then they would be in balance.
After the Big Bang, the slightest of imbalances in the distribution of matter and anti-matter would, I think, grow more pronounced as a local surplus of matter would persist if bombarded with equal amounts of matter and anti-matter. Over time, that matter would gravitationally come together and locally grow more dense. Gravitation thus would segregate matter and anti-matter as most of space became empty. Thus perhaps half the stars that we see might be made of anti-matter. For the photons they produce would be the same, yes? And the gravitational force is the same.
In particular, I wish to know approximately what is the density of mass in the space midway between our solar system and Alpha Centauri? What would be the nature and magnitude of energy released there if matter from our side was colliding with anti-matter from Alpha Centauri's side? Would we be able to detect that? Please, I would like to see a calculation! Thank you.
universe spectroscopy antimatter stars cosmic-rays
asked 9 hours ago
Andrius KulikauskasAndrius Kulikauskas
465 bronze badges
$endgroup$
1
$begingroup$
If only space was empty in between.
$endgroup$
– safesphere
9 hours ago
$begingroup$
See my answer to this questioin: physics.stackexchange.com/questions/187061/…
$endgroup$
– Lewis Miller
8 hours ago
1
$begingroup$
Possible duplicate of Experimental observation of matter/antimatter in the universe
$endgroup$
– John Rennie
8 hours ago
$begingroup$
Thank you, @John_Rennie. I have edited my question to ask for a specific calculation.
$endgroup$
– Andrius Kulikauskas
7 hours ago
$begingroup$
Thank you, @Lewis_Miller From your answer it seems that, at least experimentally, it's not known how gravity behaves with regard to anti-matter. But for my question I will suppose that matter and anti-matter behave the same, which is to say, they are attracted gravitationally. Although if they worked in opposite ways it would clearly support segregation.
$endgroup$
– Andrius Kulikauskas
7 hours ago
|
show 1 more comment
$begingroup$
How can we tell if a star is made of matter or anti-matter? For example, is there any difference spectroscopically? Or could we tell from cosmic rays?
If half of the stars were made of matter and half of anti-matter, then they would be in balance.
After the Big Bang, the slightest of imbalances in the distribution of matter and anti-matter would, I think, grow more pronounced as a local surplus of matter would persist if bombarded with equal amounts of matter and anti-matter. Over time, that matter would gravitationally come together and locally grow more dense. Gravitation thus would segregate matter and anti-matter as most of space became empty. Thus perhaps half the stars that we see might be made of anti-matter. For the photons they produce would be the same, yes? And the gravitational force is the same.
In particular, I wish to know approximately what is the density of mass in the space midway between our solar system and Alpha Centauri? What would be the nature and magnitude of energy released there if matter from our side was colliding with anti-matter from Alpha Centauri's side? Would we be able to detect that? Please, I would like to see a calculation! Thank you.
universe spectroscopy antimatter stars cosmic-rays
asked 9 hours ago
Andrius KulikauskasAndrius Kulikauskas
465 bronze badges
$endgroup$
How can we tell if a star is made of matter or anti-matter? For example, is there any difference spectroscopically? Or could we tell from cosmic rays?
If half of the stars were made of matter and half of anti-matter, then they would be in balance.
After the Big Bang, the slightest of imbalances in the distribution of matter and anti-matter would, I think, grow more pronounced as a local surplus of matter would persist if bombarded with equal amounts of matter and anti-matter. Over time, that matter would gravitationally come together and locally grow more dense. Gravitation thus would segregate matter and anti-matter as most of space became empty. Thus perhaps half the stars that we see might be made of anti-matter. For the photons they produce would be the same, yes? And the gravitational force is the same.
In particular, I wish to know approximately what is the density of mass in the space midway between our solar system and Alpha Centauri? What would be the nature and magnitude of energy released there if matter from our side was colliding with anti-matter from Alpha Centauri's side? Would we be able to detect that? Please, I would like to see a calculation! Thank you.
universe spectroscopy antimatter stars cosmic-rays
universe spectroscopy antimatter stars cosmic-rays
asked 9 hours ago
Andrius KulikauskasAndrius Kulikauskas
465 bronze badges
asked 9 hours ago
Andrius KulikauskasAndrius Kulikauskas
465 bronze badges
edited 7 hours ago
Andrius Kulikauskas
asked 9 hours ago
Andrius KulikauskasAndrius Kulikauskas
465 bronze badges
asked 9 hours ago
Andrius KulikauskasAndrius Kulikauskas
465 bronze badges
asked 9 hours ago
Andrius KulikauskasAndrius Kulikauskas
465 bronze badges
465 bronze badges
1
$begingroup$
If only space was empty in between.
$endgroup$
– safesphere
9 hours ago
$begingroup$
See my answer to this questioin: physics.stackexchange.com/questions/187061/…
$endgroup$
– Lewis Miller
8 hours ago
1
$begingroup$
Possible duplicate of Experimental observation of matter/antimatter in the universe
$endgroup$
– John Rennie
8 hours ago
$begingroup$
Thank you, @John_Rennie. I have edited my question to ask for a specific calculation.
$endgroup$
– Andrius Kulikauskas
7 hours ago
$begingroup$
Thank you, @Lewis_Miller From your answer it seems that, at least experimentally, it's not known how gravity behaves with regard to anti-matter. But for my question I will suppose that matter and anti-matter behave the same, which is to say, they are attracted gravitationally. Although if they worked in opposite ways it would clearly support segregation.
$endgroup$
– Andrius Kulikauskas
7 hours ago
|
show 1 more comment
1
$begingroup$
If only space was empty in between.
$endgroup$
– safesphere
9 hours ago
$begingroup$
See my answer to this questioin: physics.stackexchange.com/questions/187061/…
$endgroup$
– Lewis Miller
8 hours ago
1
$begingroup$
Possible duplicate of Experimental observation of matter/antimatter in the universe
$endgroup$
– John Rennie
8 hours ago
$begingroup$
Thank you, @John_Rennie. I have edited my question to ask for a specific calculation.
$endgroup$
– Andrius Kulikauskas
7 hours ago
$begingroup$
Thank you, @Lewis_Miller From your answer it seems that, at least experimentally, it's not known how gravity behaves with regard to anti-matter. But for my question I will suppose that matter and anti-matter behave the same, which is to say, they are attracted gravitationally. Although if they worked in opposite ways it would clearly support segregation.
$endgroup$
– Andrius Kulikauskas
7 hours ago
1
1
$begingroup$
If only space was empty in between.
$endgroup$
– safesphere
9 hours ago
$begingroup$
If only space was empty in between.
$endgroup$
– safesphere
9 hours ago
$begingroup$
See my answer to this questioin: physics.stackexchange.com/questions/187061/…
$endgroup$
– Lewis Miller
8 hours ago
$begingroup$
See my answer to this questioin: physics.stackexchange.com/questions/187061/…
$endgroup$
– Lewis Miller
8 hours ago
1
1
$begingroup$
Possible duplicate of Experimental observation of matter/antimatter in the universe
$endgroup$
– John Rennie
8 hours ago
$begingroup$
Possible duplicate of Experimental observation of matter/antimatter in the universe
$endgroup$
– John Rennie
8 hours ago
$begingroup$
Thank you, @John_Rennie. I have edited my question to ask for a specific calculation.
$endgroup$
– Andrius Kulikauskas
7 hours ago
$begingroup$
Thank you, @John_Rennie. I have edited my question to ask for a specific calculation.
$endgroup$
– Andrius Kulikauskas
7 hours ago
$begingroup$
Thank you, @Lewis_Miller From your answer it seems that, at least experimentally, it's not known how gravity behaves with regard to anti-matter. But for my question I will suppose that matter and anti-matter behave the same, which is to say, they are attracted gravitationally. Although if they worked in opposite ways it would clearly support segregation.
$endgroup$
– Andrius Kulikauskas
7 hours ago
$begingroup$
Thank you, @Lewis_Miller From your answer it seems that, at least experimentally, it's not known how gravity behaves with regard to anti-matter. But for my question I will suppose that matter and anti-matter behave the same, which is to say, they are attracted gravitationally. Although if they worked in opposite ways it would clearly support segregation.
$endgroup$
– Andrius Kulikauskas
7 hours ago
|
show 1 more comment
1 Answer
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$begingroup$
An antimatter star would release an antimatter solar wind (antiprotons and positrons mainly). As this antimatter solar wind collides with the ordinary-matter solar wind from the ordinary-matter stars surrounding it, it produces a gamma-ray source with a very specific spectrum corresponding to matter-antimatter annihilation where these two winds collide. The fact that we don't see any such nearby gamma-ray source is strong evidence that there are no antimatter stars anywhere near us (or, in fact, basically anywhere - gamma-ray telescopes are quite sensitive to such a signature).
answered 8 hours ago
probably_someoneprobably_someone
22.5k1 gold badge34 silver badges68 bronze badges
$endgroup$
$begingroup$
Thank you, @probably_someone Please could you express that with a calculation?
$endgroup$
– Andrius Kulikauskas
7 hours ago
add a comment
|
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$begingroup$
An antimatter star would release an antimatter solar wind (antiprotons and positrons mainly). As this antimatter solar wind collides with the ordinary-matter solar wind from the ordinary-matter stars surrounding it, it produces a gamma-ray source with a very specific spectrum corresponding to matter-antimatter annihilation where these two winds collide. The fact that we don't see any such nearby gamma-ray source is strong evidence that there are no antimatter stars anywhere near us (or, in fact, basically anywhere - gamma-ray telescopes are quite sensitive to such a signature).
answered 8 hours ago
probably_someoneprobably_someone
22.5k1 gold badge34 silver badges68 bronze badges
$endgroup$
$begingroup$
Thank you, @probably_someone Please could you express that with a calculation?
$endgroup$
– Andrius Kulikauskas
7 hours ago
add a comment
|
$begingroup$
An antimatter star would release an antimatter solar wind (antiprotons and positrons mainly). As this antimatter solar wind collides with the ordinary-matter solar wind from the ordinary-matter stars surrounding it, it produces a gamma-ray source with a very specific spectrum corresponding to matter-antimatter annihilation where these two winds collide. The fact that we don't see any such nearby gamma-ray source is strong evidence that there are no antimatter stars anywhere near us (or, in fact, basically anywhere - gamma-ray telescopes are quite sensitive to such a signature).
answered 8 hours ago
probably_someoneprobably_someone
22.5k1 gold badge34 silver badges68 bronze badges
$endgroup$
$begingroup$
Thank you, @probably_someone Please could you express that with a calculation?
$endgroup$
– Andrius Kulikauskas
7 hours ago
add a comment
|
$begingroup$
An antimatter star would release an antimatter solar wind (antiprotons and positrons mainly). As this antimatter solar wind collides with the ordinary-matter solar wind from the ordinary-matter stars surrounding it, it produces a gamma-ray source with a very specific spectrum corresponding to matter-antimatter annihilation where these two winds collide. The fact that we don't see any such nearby gamma-ray source is strong evidence that there are no antimatter stars anywhere near us (or, in fact, basically anywhere - gamma-ray telescopes are quite sensitive to such a signature).
answered 8 hours ago
probably_someoneprobably_someone
22.5k1 gold badge34 silver badges68 bronze badges
$endgroup$
An antimatter star would release an antimatter solar wind (antiprotons and positrons mainly). As this antimatter solar wind collides with the ordinary-matter solar wind from the ordinary-matter stars surrounding it, it produces a gamma-ray source with a very specific spectrum corresponding to matter-antimatter annihilation where these two winds collide. The fact that we don't see any such nearby gamma-ray source is strong evidence that there are no antimatter stars anywhere near us (or, in fact, basically anywhere - gamma-ray telescopes are quite sensitive to such a signature).
answered 8 hours ago
probably_someoneprobably_someone
22.5k1 gold badge34 silver badges68 bronze badges
answered 8 hours ago
probably_someoneprobably_someone
22.5k1 gold badge34 silver badges68 bronze badges
answered 8 hours ago
probably_someoneprobably_someone
22.5k1 gold badge34 silver badges68 bronze badges
answered 8 hours ago
probably_someoneprobably_someone
22.5k1 gold badge34 silver badges68 bronze badges
22.5k1 gold badge34 silver badges68 bronze badges
$begingroup$
Thank you, @probably_someone Please could you express that with a calculation?
$endgroup$
– Andrius Kulikauskas
7 hours ago
add a comment
|
$begingroup$
Thank you, @probably_someone Please could you express that with a calculation?
$endgroup$
– Andrius Kulikauskas
7 hours ago
$begingroup$
Thank you, @probably_someone Please could you express that with a calculation?
$endgroup$
– Andrius Kulikauskas
7 hours ago
$begingroup$
Thank you, @probably_someone Please could you express that with a calculation?
$endgroup$
– Andrius Kulikauskas
7 hours ago
add a comment
|
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$begingroup$
If only space was empty in between.
$endgroup$
– safesphere
9 hours ago
$begingroup$
See my answer to this questioin: physics.stackexchange.com/questions/187061/…
$endgroup$
– Lewis Miller
8 hours ago
1
$begingroup$
Possible duplicate of Experimental observation of matter/antimatter in the universe
$endgroup$
– John Rennie
8 hours ago
$begingroup$
Thank you, @John_Rennie. I have edited my question to ask for a specific calculation.
$endgroup$
– Andrius Kulikauskas
7 hours ago
$begingroup$
Thank you, @Lewis_Miller From your answer it seems that, at least experimentally, it's not known how gravity behaves with regard to anti-matter. But for my question I will suppose that matter and anti-matter behave the same, which is to say, they are attracted gravitationally. Although if they worked in opposite ways it would clearly support segregation.
$endgroup$
– Andrius Kulikauskas
7 hours ago