Message boards :
Science (non-SETI) :
Dark matter/Dark Energy
Message board moderation
Previous · 1 . . . 7 · 8 · 9 · 10 · 11 · 12 · Next
Author | Message |
---|---|
Dr Who Fan Send message Joined: 8 Jan 01 Posts: 3343 Credit: 715,342 RAC: 4 |
Below is a link to the ORIGINAL SOURCE and is not BLOCKED behind a PayWall http://www.ibtimes.co.uk/gps-atomic-clocks-used-detect-dark-matter-space-time-fabric-1475327 ---snip-- Andrei Derevianko, of the University of Nevada, said: "Despite solid observational evidence for the existence of dark matter, its nature remains a mystery. Some research programs in particle physics assume that dark matter is composed of heavy-particle-like matter. This assumption may not hold true, and significant interest exists for alternatives. |
Lynn Send message Joined: 20 Nov 00 Posts: 14162 Credit: 79,603,650 RAC: 123 |
A signal picked up by Dutch and Swiss scientists is thought to be the first phsical evidence of Dark Matter It was first theorised more than 70 years ago, but after decades of searching, scientists believe they have seen the first sign of elusive Dark Matter. Researchers have picked up unexpected signals coming from a cluster of galaxies in the constellation Perseus and in the Andromeda galaxy. All atoms emit a distinct pattern of light called a spectrum which is how astrophysicists can determine what planets and stars are made from at great distances. http://www.telegraph.co.uk/news/science/science-news/11288601/Have-scientists-found-first-sign-of-Dark-Matter.html |
tullio Send message Joined: 9 Apr 04 Posts: 8797 Credit: 2,930,782 RAC: 1 |
In a recent ESA meeting in Ferrara the scientists managing the Planck satellite observatory said that the excess of high energy positrons in space is not due to the annihilation of dark matter, as it was proposed. When I find a link I shall post it. Tullio |
Julie Send message Joined: 28 Oct 09 Posts: 34060 Credit: 18,883,157 RAC: 18 |
In a recent ESA meeting in Ferrara the scientists managing the Planck satellite observatory said that the excess of high energy positrons in space is not due to the annihilation of dark matter, as it was proposed. When I find a link I shall post it. Interesting... Thanx Tullio. rOZZ Music Pictures |
Lynn Send message Joined: 20 Nov 00 Posts: 14162 Credit: 79,603,650 RAC: 123 |
Strange matter??? Forget dark matter, STRANGE matter could be lurking somewhere in the universe - and there may be entire stars made of it Scientists at the National Institute for Space Research in Brazil say an undiscovered type of matter could be found in neutron stars Here matter is so dense that it could be 'squashed' into strange matter This would create an entire 'strange star' - unlike anything we have seen However, the exact properties of strange matter are unknown If it exists, though, it could help scientists discover ripples in space-time known as gravitational waves http://www.dailymail.co.uk/sciencetech/article-2903181/Forget-dark-matter-STRANGE-matter-lurking-universe-entire-stars-it.html |
Bob DeWoody Send message Joined: 9 May 10 Posts: 3387 Credit: 4,182,900 RAC: 10 |
New revelations show how much we still don't know about our universe and how much is still just guesswork. Bob DeWoody My motto: Never do today what you can put off until tomorrow as it may not be required. This no longer applies in light of current events. |
Lynn Send message Joined: 20 Nov 00 Posts: 14162 Credit: 79,603,650 RAC: 123 |
New revelations show how much we still don't know about our universe and how much is still just guesswork. +100 :) |
Julie Send message Joined: 28 Oct 09 Posts: 34060 Credit: 18,883,157 RAC: 18 |
Scientists at the National Institute for Space Research in Brazil say an undiscovered type of matter could be found in neutron stars. Here matter is so dense that it could be 'squashed' into strange matter. This would create an entire 'strange star' - unlike anything we have seen. The theory was proposed by Dr Pedro Moraes and Dr Oswaldo Miranda, both of the National Institute for Space Research in Brazil. We'll have to abide and see how many discoveries will still be made before we can have a clear view on how the Universe is compiled. rOZZ Music Pictures |
William Rothamel Send message Joined: 25 Oct 06 Posts: 3756 Credit: 1,999,735 RAC: 4 |
Don't know how we got into Lead. I do know that early canning used lead as a sealer; this was about at the time of the American Civil War. Canned foods allowed an Army much more mobility. It also lead to many deaths and illnesses from this lead in early canned goods. |
Bob DeWoody Send message Joined: 9 May 10 Posts: 3387 Credit: 4,182,900 RAC: 10 |
I'll continue the off topic discussion. Wasn't Shackleton's arctic expedition ruined by lead poisoning from the canned food they brought with them? Now where did that dark matter and energy go? Bob DeWoody My motto: Never do today what you can put off until tomorrow as it may not be required. This no longer applies in light of current events. |
Grant Nelson Send message Joined: 7 May 12 Posts: 8022 Credit: 4,237,757 RAC: 0 |
One man said we know don't eveything by a lot. Quite true. Cheers everybody Life is short so don't sip Beer speaks, people mumble |
William Rothamel Send message Joined: 25 Oct 06 Posts: 3756 Credit: 1,999,735 RAC: 4 |
Back on Topic: I continue to say": If there is Dark Matter then let's send a probe and bring some of it back for analysis. |
Bob DeWoody Send message Joined: 9 May 10 Posts: 3387 Credit: 4,182,900 RAC: 10 |
I thought it was supposed to be all around us. Or was that dark energy. I still say that if over 75% of the universe is made up of dark matter and dark energy then we don't know nuthin about nuthin regarding the universe and it's fate. Bob DeWoody My motto: Never do today what you can put off until tomorrow as it may not be required. This no longer applies in light of current events. |
Convergence Send message Joined: 23 Jun 08 Posts: 117 Credit: 2,928,788 RAC: 0 |
Dark Matter only interacts with matter via gravity, and weakly at that. According to Brian Greene, it could also be the weak gravitational pull of another universe through the higher dimensions of this universe, if M-theory is correct. It cannot be collected and studied like ordinary matter, in either case. Its effects only become noticeable at interstellar distances and larger. Dark Energy is the miniscule expansion of the universe. Its effects only become noticeable at intergalactic distances and larger due to the vastness of space and how relatively small the expansion is on our scale. |
Julie Send message Joined: 28 Oct 09 Posts: 34060 Credit: 18,883,157 RAC: 18 |
|
tullio Send message Joined: 9 Apr 04 Posts: 8797 Credit: 2,930,782 RAC: 1 |
On the December issue of Cern Courier there is a book reviewed on this subject. The book is "Behind the Scenes of the Universe From the Higgs to Dark Matter" by Gianfranco Bertone, Oxford University Press. Tullio |
Lynn Send message Joined: 20 Nov 00 Posts: 14162 Credit: 79,603,650 RAC: 123 |
It's out there and they can't find it. Hypothetical particle may get to the heart of universe's dark matter A completely new type of fundamental particle may explain the mystery of “dark matterâ€, the missing material that makes up more than 80 per cent of the universe’s mass, British scientists believe. Dark matter reveals itself in the way its gravity affects stars and galaxies, but has never been directly observed. University of Southampton researchers believe one reason may be that dark matter particles are much lighter than has previously been proposed, with the mass of only 0.02 per cent of an electron. Their findings are published in the journal Scientific Reports. http://www.independent.co.uk/news/science/hypothetical-particle-may-get-to-the-heart-of-universes-dark-matter-10016943.html |
William Rothamel Send message Joined: 25 Oct 06 Posts: 3756 Credit: 1,999,735 RAC: 4 |
with the mass of only 0.02 per cent of an electron. Makes me think that we need to have another look at Neutrinos. |
tullio Send message Joined: 9 Apr 04 Posts: 8797 Credit: 2,930,782 RAC: 1 |
Yes, "sterile neutrinos". |
KLiK Send message Joined: 31 Mar 14 Posts: 1304 Credit: 22,994,597 RAC: 60 |
I thought it was supposed to be all around us. Or was that dark energy. I still say that if over 75% of the universe is made up of dark matter and dark energy then we don't know nuthin about nuthin regarding the universe and it's fate. And if the Universe isn't FLAT, which is proven it isn't...than the omega energy in the Universe isn't ewqual to 0...and Universe became in a Sea of some MATHER, which does not interfece with the laws within this Universe...than, we can only speculate about the Dark mather! ;) non-profit org. Play4Life in Zagreb, Croatia, EU |
©2024 University of California
SETI@home and Astropulse are funded by grants from the National Science Foundation, NASA, and donations from SETI@home volunteers. AstroPulse is funded in part by the NSF through grant AST-0307956.