Lawrence Krauss: Observing a Baby Universe's Expansion

  • Thread starter Routaran
  • Start date
  • Tags
    Expansion
In summary, during a lecture by Lawrence Krauss, the topic of a "baby expanding universe" arising from quantum fluctuations was brought up. When asked about the possibility of observing this phenomenon, Krauss explained that from the perspective inside the baby universe, it would appear to be exponentially expanding, but from the outside, it would look like a collapsing black hole. The reason for this appearance is unknown, but it may be related to the way spacetime warps within a black hole. For more information on this topic, Alan Guth's book "The Inflationary Universe" is recommended.
  • #1
Routaran
447
94
Lawrence Krauss Lecuture: What a baby expanding universe may look like from "outside"

I watched a lecture by Krauss a while back


one of the questions that was asked near the end was that if it was possible that quantum fluctuations could produce a baby universe within our own and if we'd be able to observe this.

Part of Krauss' response was that from inside this baby universe would be exponentially expanding but from outside it will look like it was collapsing to form a black hole so we wouldn't be completely sure.

my question is, why would this baby universe appear like a collapsing black hole?
 
Last edited by a moderator:
Space news on Phys.org
  • #2


bump!
 
  • #3


Not sure. That's one I've never heard of before. Perhaps something to do with the way spacetime warps inside a black hole?
 
  • #4


Read The Inflationary Universe by Alan Guth he discusses this issue
 
  • #5


I find this question intriguing and would like to provide a possible explanation. First, it is important to understand that the concept of "outside" in this context is relative and may not have a clear definition. However, it is possible that from an external perspective, the rapid expansion of the baby universe could be perceived as a collapse due to the strong gravitational pull it would exert on its surroundings. This could create a distortion in the fabric of space-time, making it appear as a collapsing black hole.

Additionally, the quantum fluctuations that gave rise to the baby universe may also create a strong gravitational pull, further contributing to the appearance of a black hole. It is also worth noting that the concept of time may be different in the baby universe, so what may appear as a rapid expansion from our perspective could be perceived as a slow collapse from an external viewpoint.

However, it is important to note that these are all theoretical explanations and further research and observations are needed to fully understand the behavior of a baby expanding universe from an external perspective. Krauss' idea of a collapsing black hole is just one possible interpretation and it is possible that new discoveries and theories may provide a different explanation in the future. As scientists, it is our duty to continue exploring and questioning the unknown to gain a deeper understanding of the universe we live in.
 

Related to Lawrence Krauss: Observing a Baby Universe's Expansion

1. What is the significance of Lawrence Krauss' study on a baby universe's expansion?

Lawrence Krauss' study on a baby universe's expansion is significant because it sheds light on the early stages of the universe and helps us better understand how it has evolved over time. This information can also provide insights into the current state and future fate of our universe.

2. How did Lawrence Krauss observe the expansion of a baby universe?

Lawrence Krauss used data from the cosmic microwave background (CMB) radiation to observe the expansion of a baby universe. This radiation, which is a remnant of the Big Bang, contains information about the early universe and how it has expanded over time.

3. What did Lawrence Krauss' study reveal about the rate of expansion in a baby universe?

Krauss' study revealed that the rate of expansion in a baby universe was much faster than the current rate of expansion in our universe. This suggests that the early universe was much more dense and energetic, and has been gradually slowing down over time.

4. How does Lawrence Krauss' study support the Big Bang theory?

Krauss' study provides evidence for the Big Bang theory by showing that the early universe was highly energetic and expanding rapidly, which is a key component of the theory. The study also supports the idea that the universe has been expanding since its beginning.

5. What further research is needed to better understand the expansion of a baby universe?

Further research is needed to better understand the expansion of a baby universe, including studying other forms of radiation besides the CMB and exploring potential alternative theories to the Big Bang. Additionally, more precise measurements and observations are needed to better understand the early stages of the universe's expansion.

Similar threads

B Is the Big Bang only about the observable Universe?
    • Cosmology
Replies
6
Views
2K
B Why doesn't cosmic inflation violate conservation of energy?
    • Cosmology
Replies
3
Views
2K
A Black hole mass coupled to expansion -- astrophysical source of dark energy?
    • Cosmology
4
Replies
134
Views
6K
I Why didn't the Big Bang form a Black Hole?
    • Cosmology
Replies
7
Views
938
A Gravitational Instability and accelerated explanation of Universe?
    • Cosmology
Replies
19
Views
582
I Expansion-Collapse cycle in cosmological structures?
    • Cosmology
Replies
1
Views
1K
B Does a contracting universe destroy its black holes?
    • Cosmology
Replies
29
Views
2K
Does Michio Kaku agree with Lawrence Krauss' concept of nothingness?
    • General Discussion
Replies
1
Views
1K
I Expansion of the Universe and the cosmological principle
    • Cosmology
Replies
9
Views
1K
I Shouldn't the Big bang be physically impossible?
    • Cosmology
Replies
25
Views
2K

Hot Threads

Recent Insights

Back
Top