New initiative to explore origin and future of Universe

Discussions ranging from space technology, near-earth and solar system missions, to efforts to understand the large-scale structure of the cosmos.

New initiative to explore origin and future of Universe

Postby socrat44 on September 24th, 2019, 9:01 pm 

New initiative to explore origin and future of Universe
by Staff Writers
Hannover, Germany (SPX) Sep 23, 2019

The goal of the newly funded initiative "New Directions
in Cosmology and Gravitational Theory" is to develop and
test theories of the origin, evolution, and future of the
universe that challenge the standard view that the
universe began with a big bang about 14 billion years ago.
#
"According to the new paradigm that we want to formulate
and test observationally, the universe did not begin with
a big bang," explains Ijjas. "It rather 'bounced' from a previous
period of contraction to the current phase of accelerated
expansion we see today. It may even be that space-time
is eternal, driven through regular cycles of expansion,
contraction and bounce by what we call 'dark energy' today."

http://www.spacedaily.com/reports/New_i ... e_999.html
===
Attachments
cosmic-evolution-cyclic-universe-big-bang.jpg
socrat44
Member
 
Posts: 398
Joined: 12 Dec 2015
curiosity liked this post


Re: New initiative to explore origin and future of Universe

Postby socrat44 on September 24th, 2019, 9:21 pm 

Astrophysicist Shepherd Doeleman shows the first image of a black hole Wednesday. | REUTERS
Commentary / World
Einstein couldn't believe his own black hole theory
by Faye Flam
#
''But here’s the question we really need to have answered:
Will black holes eventually eat the universe?
No, Tremaine said.
Even those supermassive monsters probably grew
much faster when they were younger,
and they eventually slow down.''

https://www.japantimes.co.jp/opinion/20 ... Yq9rfZFz4s
Attachments
0-p7-flam-a-20190413-870x580.jpg
socrat44
Member
 
Posts: 398
Joined: 12 Dec 2015


Re: New initiative to explore origin and future of Universe

Postby socrat44 on September 27th, 2019, 8:08 pm 

I'm A Dark Matter Detective Solving
The Universe's Biggest Mystery
From 1km Below Ground

Elisabetta Barberio
Physics Professor, University of Melbourne;
Director of the Centre for Dark Matter Particle Physics
Tue 24 Sep 2019 1.22 AM

'' No one knows yet what dark matter is.''

https://10daily.com.au/views/a190923yct ... d-20190924
Attachments
fake.jpg
socrat44
Member
 
Posts: 398
Joined: 12 Dec 2015


Re: New initiative to explore origin and future of Universe

Postby socrat44 on September 27th, 2019, 8:33 pm 

We know that there is a lot of dark matter in the galaxy.
Between 70 and 80 percent of the material in the galaxy
is dark matte . . .
https://10daily.com.au/views/a190923yct ... d-20190924
Attachments
Dark - 1.jpg
socrat44
Member
 
Posts: 398
Joined: 12 Dec 2015


Re: New initiative to explore origin and future of Universe

Postby socrat44 on September 28th, 2019, 4:54 am 

These crystals react when they are struck by
dark matter particles and have to be kept
underground from other forms of radiation
so we don’t get false readings.
The Stawell Underground Physics Laboratory
(SUPL) is being built 1,025 meters below ground.
Once we have results, we’ll compare those with
the results from detectors in other parts of the world.

https://10daily.com.au/views/a190923yct ... d-20190924
#
The Universe's Biggest Mystery:
To know better Cosmos - scientists need to go deeper Below Ground
/ to the center of Earth ? - 2019
''Journey to the Center of the Earth'' - 1864 by Jules Verne /
===============
socrat44
Member
 
Posts: 398
Joined: 12 Dec 2015


Re: New initiative to explore origin and future of Universe

Postby BurtJordaan on September 28th, 2019, 11:33 am 

The idea of a cyclic universe is not new, of course, but this initiative will undoubtedly breath some new life into it. I find the idea much more satisfying than something from nothing, with that something decaying into nothing again...

One must keep in mind that the pretty picture of contraction followed by expansion represents only the observable universe, and hence a negligibly small portion of the whole.
User avatar
BurtJordaan
Forum Moderator
 
Posts: 2711
Joined: 17 Oct 2009
Location: South Africa
Blog: View Blog (9)
dandelion liked this post


Re: New initiative to explore origin and future of Universe

Postby socrat44 on September 29th, 2019, 4:00 am 

Congratulations, You Survived Black Hole Week
By Dennis Overbye
Sept. 27, 2019
#
. . black holes, those Einsteinian monsters
that can swallow light and everything else,
behaving badly.
Black holes eating stars, or whole gangs of them.
Black holes burping energy from the centers of galaxies.
Black holes banging together in universe-shaking events.
A very hungry hole

https://www.nytimes.com/2019/09/27/scie ... -week.html

========
socrat44
Member
 
Posts: 398
Joined: 12 Dec 2015


Re: New initiative to explore origin and future of Universe

Postby socrat44 on September 29th, 2019, 7:11 am 

BurtJordaan » September 28th, 2019, 11:33 am wrote:The idea of a cyclic universe is not new, of course,
but this initiative will undoubtedly breath some new life into it.
I find the idea much more satisfying than something from nothing,
with that something decaying into nothing again...

One must keep in mind that the pretty picture of contraction
followed by expansion represents only the observable universe,
and hence a negligibly small portion of the whole.


It can be a great deal with ''NOTHING''
#
“‎In modern physics, there is no such thing as “nothing.”
Even in a perfect vacuum, pairs of virtual particles are constantly
being created and destroyed. The existence of these particles
is no mathematical fiction. Though they cannot be directly observed,
the effects they create are quite real. The assumption that they exist
leads to predictions that have been confirmed by experiment to
a high degree of accuracy.”
― Richard Morris
#
Although we are used to thinking of empty space as containing
nothing at all, and therefore having zero energy, the quantum
rules say that there is some uncertainty about this. Perhaps each
tiny bit of the vacuum actually contains rather a lot of energy.
If the vacuum contained enough energy, it could convert this
into particles, in line with E-Mc^2.
/ Book: Stephen Hawking. Pages 147-148.
By Michael White and John Gribbin. /
===============
socrat44
Member
 
Posts: 398
Joined: 12 Dec 2015


Re: New initiative to explore origin and future of Universe

Postby socrat44 on September 30th, 2019, 2:58 am 

How Do Black Holes Form?
Primordial black holes are thought to have formed
in the early universe, soon after the big bang.
Stellar black holes form when the center of a very
massive star collapses in upon itself.
This collapse also causes a supernova, or
an exploding star, that blasts part of the star into space.

https://www.nasa.gov/audience/forstuden ... le-58.html

Soon after the big bang a very Primordial massive star collapses in upon itself . . .
#
By absorbing other stars and merging with other black holes,
supermassive black holes of millions of solar masses (M☉) may form.

https://en.wikipedia.org/wiki/Black_hole

Questions:
1 - In which Reference Frame the very Primordial massive
Star collapsed, soon after the big-bang ?
2 - What was temperature of the RF where the very
Primordial massive Star was collapsed ?
===============
socrat44
Member
 
Posts: 398
Joined: 12 Dec 2015


Re: New initiative to explore origin and future of Universe

Postby curiosity on September 30th, 2019, 6:04 am 

One must keep in mind that the pretty picture of contraction followed by expansion represents only the observable universe, and hence a negligibly small portion of the whole.


The first paragraph of your post matches my own thoughts precisely. However I would like some clarification on the second paragraph (Above)... I of course realise that we will only ever be able the see the percentage of the universe from which light can reach us and maybe I am simply misinterpreting your words, but I know of no reason to suspect that the metric expansion of space-time ceases at that boundary. If you do know of a reason I would be most grateful if you could enlighten me.

Regards, Graham.
curiosity
Member
 
Posts: 391
Joined: 19 Jul 2012


Re: New initiative to explore origin and future of Universe

Postby BurtJordaan on September 30th, 2019, 8:02 am 

curiosity » 30 Sep 2019, 12:04 wrote: I of course realise that we will only ever be able the see the percentage of the universe from which light can reach us and maybe I am simply misinterpreting your words, but I know of no reason to suspect that the metric expansion of space-time ceases at that boundary. If you do know of a reason I would be most grateful if you could enlighten me.

There is no reason, as you suspect and we can expect the whole possibly infinite shebang to expand, possibly forever. I have written a summary of a cyclic universe 'brane' model on one of my engineering blogs, but AFAIK, this still represents an infinite brane expanding forever.

The colliding branes just give rise to a new epoch of particle creation, during a new Bang, sort-of. As I understand it, there should be a difference in the primordial gravitational waves in terms of level and polarization emanating from inflation vs. from the brane collision, if we can ever detect them. No luck so far, but new detector are built all the time...
User avatar
BurtJordaan
Forum Moderator
 
Posts: 2711
Joined: 17 Oct 2009
Location: South Africa
Blog: View Blog (9)


Re: New initiative to explore origin and future of Universe

Postby dandelion on October 1st, 2019, 3:34 pm 

I find this sort of discussion fascinating!
dandelion
Member
 
Posts: 393
Joined: 02 May 2014


Re: New initiative to explore origin and future of Universe

Postby socrat44 on October 1st, 2019, 8:48 pm 

BurtJordaan » September 30th, 2019, 8:02 am wrote:. . . we can expect the whole possibly infinite shebang to expand, possibly forever.


The Universe (as whole) is a homogeneous and isotropic . . .
. . . after every cosmic homogeneous and isotropic event horizon
there is other one . . . and so, and so . . . forever
===
socrat44
Member
 
Posts: 398
Joined: 12 Dec 2015



Return to Astronomy & Cosmology

Who is online

Users browsing this forum: No registered users and 14 guests

cron