Age of Universe: Impact of Expanding Acceleration?

  • Thread starter Thread starter daviar
  • Start date Start date
  • Tags Tags
    Age Universe
AI Thread Summary
The discussion centers on the implications of the universe's accelerated expansion on its age and the calculated distances to galaxies. It questions whether the recent discovery of this acceleration affects the previously established estimate of the universe's age, currently pegged at 13.7 billion years. Participants note that the age estimate now incorporates the effects of accelerated expansion. The nature of the acceleration—whether constant or increasing—is also debated, with a consensus that more data is needed for clarity. Ultimately, the conversation emphasizes the complexity of cosmological measurements and the ongoing need for refined calculations.
daviar
Messages
3
Reaction score
0
Assuming it has only been recently discovered that the expanding universe is expanding at an accelerated rate, and assuming the calculation of the age and distances to galaxies has been based on the old rate of expansion. Does that not affect the estimate of how old the universe is? Does that not also affect the distances calculated?

Is the accelerated expansion a constant acceleration? Or is it an accelerating acceleration?
 
Astronomy news on Phys.org
It does not affect the age of the universe, only its size.
 
daviar said:
Assuming it has only been recently discovered that the expanding universe is expanding at an accelerated rate, and assuming the calculation of the age and distances to galaxies has been based on the old rate of expansion. Does that not affect the estimate of how old the universe is? Does that not also affect the distances calculated?

The 13.7 billion year age quoted these days is based on the accelerated expansion effects being taken into account. Prof. Ned Wright, at UCLA, has an online calculator that let's you modify the variables and see the results...
"[URL
Cosmology Calculator Lite[/URL]
"[URL
Advanced Cosmology Calculator[/URL] ...lets you put in neutrino masses and other things.
"[URL
Light Travel-time Calculator[/URL] ...usually the media quotes the light travel-time as the distance to very distant galaxies (which it's not.) This calculator let's you translate that into real cosmological distances.

Is the accelerated expansion a constant acceleration? Or is it an accelerating acceleration?

Not enough data yet to tell.
 
Last edited by a moderator:

Thread 'Does it make sense to build new radio telescopes?'

TL;DR Summary: In 3 years, the Square Kilometre Array (SKA) telescope (or rather, a system of telescopes) should be put into operation. In case of failure to detect alien signals, it will further expand the radius of the so-called silence (or rather, radio silence) of the Universe. Is there any sense in this or is blissful ignorance better? In 3 years, the Square Kilometre Array (SKA) telescope (or rather, a system of telescopes) should be put into operation. In case of failure to detect...
View full post »
Thread 'Could gamma-ray bursts have an intragalactic origin?'

Thread 'Could gamma-ray bursts have an intragalactic origin?'

This is indirectly evidenced by a map of the distribution of gamma-ray bursts in the night sky, made in the form of an elongated globe. And also the weakening of gamma radiation by the disk and the center of the Milky Way, which leads to anisotropy in the possibilities of observing gamma-ray bursts. My line of reasoning is as follows: 1. Gamma radiation should be absorbed to some extent by dust and other components of the interstellar medium. As a result, with an extragalactic origin, fewer...
View full post »

Thread 'Our Beautiful Universe - Photos and Videos'

This thread is dedicated to the beauty and awesomeness of our Universe. If you feel like it, please share video clips and photos (or nice animations) of space and objects in space in this thread. Your posts, clips and photos may by all means include scientific information; that does not make it less beautiful to me (n.b. the posts must of course comply with the PF guidelines, i.e. regarding science, only mainstream science is allowed, fringe/pseudoscience is not allowed). n.b. I start this...
View full post »

Similar threads

I How fast were distant galaxies moving?
Replies
7
Views
2K
I Age of the Universe and the Cosmological Constant
Replies
17
Views
2K
I Could the Universe Be Much Older Than 13.8 Billion Years?
Replies
3
Views
2K
B Acceleration of time due to entropy
Replies
1
Views
2K
B B Calculating the age of the universe with the Hubble constant
Replies
8
Views
3K
B If the universe is expanding at an accelerating rate....
Replies
3
Views
2K
B Is the Universe older than we think?
Replies
40
Views
6K
I Perceived vs. Actual Velocity in an Expanding Universe
Replies
2
Views
2K
B Standard candles in a stretching fabric of space
Replies
3
Views
2K
I Big bang balloon?
Replies
5
Views
180

Hot Threads

Recent Insights

Back
Top