Speed and / or expansion rate of the Universe?

Click For Summary
SUMMARY

The universe can indeed expand at rates exceeding the speed of light (c = 3 × 10^8 m/s) in certain regions, as described by the equation V = HD, where V is the recession velocity, H is the Hubble constant, and D is the distance. This phenomenon does not violate the laws of physics because it differentiates between proper speed and recession velocity, the latter having no upper limit. Furthermore, the concept of "outside the universe" is fundamentally flawed, as there is no defined boundary beyond the universe itself.

PREREQUISITES
  • Understanding of the Hubble Law and the Hubble constant (H)
  • Familiarity with cosmological concepts such as recession velocity
  • Basic knowledge of the speed of light as a universal constant
  • Awareness of the implications of cosmic inflation
NEXT STEPS
  • Research the Hubble constant and its role in cosmology
  • Study the concept of cosmic inflation and its effects on the universe's expansion
  • Explore the differences between proper speed and recession velocity in cosmological contexts
  • Investigate the implications of the universe's expansion on the observable universe
USEFUL FOR

Astronomers, physicists, cosmologists, and anyone interested in understanding the dynamics of the universe's expansion and the implications of relativistic speeds.

Shafat Hasan
Messages
7
Reaction score
0
Is it true that the universe itself expands faster than c = 3 × 10^8 m/s at some places / areas / points.
I have heard it but wasn't able to confirm.
Because outside of the the universe, there ain't anything as far as we understand and hence the universe should not have to follow any law as far as speed is concerned.
Can someone clarify please?
 
Space news on Phys.org
Shafat Hasan said:
Is it true that the universe itself expands faster than c = 3 × 10^8 m/s at some places / areas / points.
I have heard it but wasn't able to confirm.
"faster than c" implies that you are equating recession with proper speed. Doesn't work that way. Proper speed is confined to c. Recession veloctiy has no such limit.
Because outside of the the universe, there ain't anything as far as we understand and hence the universe should not have to follow any law as far as speed is concerned.
Can someone clarify please?
This is not correct. There IS no "outside the universe" so any "rule" you make concerning it might just as well be applied to unicorns.
 

Similar threads

High School Universe rate of expansion: speeding up or slowing down?
  • · Replies 5 ·
Replies
5
Views
2K
High School Can the "creation" of space in the Universe affect the speed of light?
  • · Replies 7 ·
Replies
7
Views
4K
Undergrad What if the Universe expands faster than the speed of light?
  • · Replies 19 ·
Replies
19
Views
5K
Undergrad How do you get to the conclusion that there is accelerating expansion?
  • · Replies 23 ·
Replies
23
Views
4K
High School Measuring the Universe's expansion rate
  • · Replies 12 ·
Replies
12
Views
2K
Undergrad Expansion of the Universe and the cosmological principle
  • · Replies 9 ·
Replies
9
Views
3K
High School Is the Universe's Expansion Misinterpreted Due to Curvature?
  • · Replies 3 ·
Replies
3
Views
2K
High School Estimates — True Size of the Universe?
  • · Replies 33 ·
2
Replies
33
Views
8K
Why can’t we observe all regions of the universe?
  • · Replies 3 ·
Replies
3
Views
697
High School What is the relationship between inflation and the expansion of our universe?
  • · Replies 1 ·
Replies
1
Views
2K