Tuesday, August 4, 2015   |   7,633 users online
Contact us    |    Advertise    |   Help   RSS icon Twitter icon Facebook icon
    Home  ·  News  ·  Forum  ·  Stories  ·  Image Gallery  ·  Columns  ·  Encyclopedia  ·  Videos  ·  Chat
Find: in

Will the universe expand forever ?


Posted on Saturday, 21 August, 2010 | Comment icon 37 comments | News tip by: Waspie_Dwarf


Image credit: NASA/ESA/ESO

 
Astronomers observing a huge galaxy cluster believe that the universe will keep on expanding indefinately.

As stars and galaxies move further and further apart eventually the universe will become a dead, dark wasteland with a temperature gardually approaching absolute zero.

"A "galactic lens" has revealed that the Universe will probably expand forever."

  View: Full article |  Source: BBC News

  Discuss: View comments (37)

   


 
Recent comments on this story
Comment icon #28 Posted by Waspie_Dwarf on 22 August, 2010, 9:23
I wasn't really trying to explain HOW the galaxies move, indeed my analogy was deliberately over simplified... as is yours. What I was trying to show was that there can be independent motion, and hence collisions, even within an expanding space/time. The reality is that galaxy movement is far more complicated as there is a layer of complexity which neither of our analogies take into account. Galaxies do not, in fact, wonder around independently on the whole, but are parts of clusters. These are groups of galaxies which are gravitationally tied together. The galaxies are free to move aro... [More]
Comment icon #29 Posted by GreyWeather on 22 August, 2010, 11:37
I don't really understand why they don't take into account the creation of matter from energy. I mean, going back to the singularity that became our universe today, it didn't contain all the matter that is here today. The first element thought to have come into being was Hydrogen, and later other electrons bonded with helium to produce Helium etcetc. Even then, also, there were no stars but slowly the universe became full of them. So, even if the Universe continues to expand, new galaxies will form around black 'holes' or even merge into giant-galaxies.
Comment icon #30 Posted by GreyWeather on 22 August, 2010, 11:45
Unless gravity isn't a force, but a by-product of space/mass. For reasoning that gravity is not uniform nor does it exist where there is no great collection of mass (more gravity inside a solar system than there is surrounding it.) I say it's not uniform, as for example, out suns gravity is strongest inside of itself, and weakest towards the edge of our solar system. At the same time, on Earth gravity is strongest away from the equater and weakest at the equater. Even Einstien and other major players in the field of Physics see gravity as an illusionary-force. Perhaps if there w... [More]
Comment icon #31 Posted by StarMountainKid on 22 August, 2010, 14:22
http://en.wikipedia.org/wiki/Dark_energy Ten years ago we did not know about dark energy and its effect accelerating the expansion of the universe. Ten years from now, or 100 years from now it's possible we may understand the fate of the universe to be quite different than we do today.
Comment icon #32 Posted by booNyzarC on 22 August, 2010, 14:44
Sorry Waspie_Dwarf, I wasn't trying to say you were wrong by any means. And you're right, my analogy is definitely over simplified. The difference between using ants on the surface of an expanding balloon and the marbles is that the ants can independently change direction, stop, and start up again, without an outside force impacting those "decisions". Marbles dumped out on the floor don't "decide" where to go, they simply interact with the other marbles, the floor, and the walls due to basic physics. I was merely offering an alternate simplified way of exp... [More]
Comment icon #33 Posted by fandango on 22 August, 2010, 16:40
Thanks, its been on my mind for a while, I think im going to look into it further. Hey I like the sound of that!
Comment icon #34 Posted by Waspie_Dwarf on 22 August, 2010, 19:58
No they won't. There is only a finite amount of matter in the universe. It is not constantly being replenished. As stars burn out and die they have used up their nuclear fuel... it can never be used again. Eventually there will be no more left for new stars. The Second Law of Thermodynamics states that entropy increases with time in a closed system. The universe is such a closed system. In effect this means that as the universe continues to expand it will become colder and colder, until it approaches absolute zero. As it approaches absolute zero no further chemical or nuclear reactions ... [More]
Comment icon #35 Posted by Waspie_Dwarf on 22 August, 2010, 20:04
It isn't a theory until it's backed up by empirical data. At present it is at best the , as a hypothesis is a proposed explanation for observed phenomena.
Comment icon #36 Posted by Waspie_Dwarf on 22 August, 2010, 20:12
That is possible, however it will not change the fact that expansion of the universe has been measured more and more accurately. We now know that the expansion is accelerating, no new discoveries are likely to change that. We may understand better why it is happening. We may discover some phenomenon that means we can get rid of the need for dark energy from our explanations. We may have a better understanding of what the consequences of a universe which expands forever are... but the speed at which the universe is expanding is a measurable quantity, it not going to be changed by any new dis... [More]
Comment icon #37 Posted by stevewinn on 22 August, 2010, 20:15
http://www.youtube.com/watch?v=GSMjtNRKepU&feature=related


Please Login or Register to post a comment.


Other news in this category
Buzz Aldrin publishes moon expenses form
Posted 8-3-2015 | 5 comments
The legendary Apollo 11 astronaut revealed that he'd been reimbursed $33.31 for costs during the trip....
 
Will we ever be able to visit 'Earth 2.0' ?
Posted 8-3-2015 | 30 comments
Kepler-452b, the most Earth-like world ever found outside our solar system, is 1400 light years away....
 
New report calls for solar storm safeguards
Posted 8-1-2015 | 5 comments
Researchers have revealed that we may only learn of an approaching solar storm twelve hours in advance....
 
Rocky planet found 21 light years away
Posted 8-1-2015 | 14 comments
Astronomers have discovered a planet that has been described as a 'potential gold mine of science data'....
 
All eyes on the sky for tonight's blue moon
Posted 7-31-2015 | 5 comments
An infrequent astronomical phenomenon is due to appear tonight for the first time in three years....
 
Aurora discovered outside our solar system
Posted 7-30-2015 | 10 comments
A glow similar to the Northern Lights has been picked up around a brown dwarf star 20 light years away....
 
Flowing ice and a red haze found on Pluto
Posted 7-25-2015 | 85 comments
New Horizons principal investigator Alan Stern has referred to the planet as a 'scientific wonderland'....
 
NASA announces discovery of a second Earth
Posted 7-23-2015 | 67 comments
Astronomers using the Kepler Telescope have found the most Earth-like extrasolar planet ever discovered....
 
New mountain range revealed on Pluto
Posted 7-22-2015 | 85 comments
New images from the New Horizons probe have revealed another vast region of mountains on Pluto's surface....
 
NASA releases new 'blue marble' Earth image
Posted 7-21-2015 | 12 comments
The breathtaking image was captured one million miles away by the Deep Space Climate Observatory....
 
Juno spacecraft to reach Jupiter next year
Posted 7-19-2015 | 8 comments
NASA's solar-powered Juno spacecraft will be arriving in orbit around Jupiter in around 12 months' time....
 

 View: More news in this category
 
Top   |  Home   |   Forum   |   News   |   Image Gallery   |  Columns   |   Encyclopedia   |   Videos   |   Polls
UM-X 10.6 Unexplained-Mysteries.com 2001-2015
Privacy Policy and Disclaimer   |   Cookies   |   Advertise   |   Contact   |   Help/FAQ