Paul Sutton

matter

Physicists suggest that black holes could have an exit to other places in the universe

Interesting article from Meson Stars regarding black holes having possible exits. I have included a paste of my Fediverse comment below. However feel free to discuss on Fediverse or on Science forums.

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This does make some sense, I have heard about white holes, which are the opposite of black holes as they allow matter to be ejected in to space.   This seems to tie in with the suggestion in the article that if you could pass through you cannot get back again.  However in relation to this

"Scientists have already said that all matter inside a black hole is destroyed, "

I got the impression matter can't be created or destroyed, it is interchangeable with energy.  In which case, could it be that matter is drawn in to a black hole, somehow converted in to energy then ejected from a white hole? 

So purely on a speculative idea

So how do we find these white holes, perhaps we have already found them as we can detect things like gamma ray bursts or neutrino emissions but can't always explain them,  perhaps these are related to white holes and we are observing the release of energy in to space as these or similar phenomenon

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#Science,#Physics,#Blackholes,#Matter,#Astronomy,#Cosmology


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The Universe May Have Started with a Dark Big Bang

Interesting article from Universe Today. This was posted to Fediverse by DeborahJRoss.

So if I understand this correctly normal matter (protons & Neutrons) formed at the same time as Dark Matter but the Dark matter evolved separately via a second big bang which produced the dark matter.

If this sounds confusing, then welcome to the world of cosmology, but it still really interesting.

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#Astronomy.#Cosmology,#Matter,#DarkMatter,#BigBang


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Active galaxies Review

So following on from the post on December 1st this is a quick review of the active galaxies lecture from the Space Telescope Science Institute.

This lecture, presented by Dr Mitchell Revalski, is really interesting, looking at how supermassive black holes, despite their small size compared to the galaxy they reside in.

Energy from these can push away surrounding gas, and heat this up which reduces star formation as gas needs to cool to form stars.

so scales are pretty huge:

First lets look at what a light year is

Citation : spaceplace.nasa.gov

For most space objects, we use light-years to describe their distance. A light-year is the distance light travels in one Earth year. One light-year is about 6 trillion miles (9 trillion km). That is a 6 with 12 zeros behind it! 

1 pc = 1 parsec = 3.26 light years

Supermassive black hole < 1pc

Bulge = 1 = 3 kpc (kilo parsec)

disk 30 kpc

circumgalactic area 50kpc

So even though these black holes are very small, they have a big influence on what surrounds them.

We know this is happening thanks to the research that led to the 2020 Nobel prize.

Well worth watching and the link is above.

Next lecture 19th Jan – The Darkest Secrets of the Universe Speaker: Raja Guhathakurta (UC Santa Cruz)

#astronomy,#science,#space,#telescope,#scsci,#talk, #solarsystem,#galaxy,#blackhole,#supermassive,#stars, #gravity,#light,#matter,#atoms,#emissions,#aabsorption, #spectrum,#gamma,#xray,#visible,#invisible,#parsec, #lightyear,#distance,#galactic,#bulge,#spacetelescope, #groundtelescope,#astronomers,#education,#public


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