What would happen if a big superfluid cloud eclipses the Sun?

Click For Summary

Discussion Overview

The discussion revolves around the hypothetical scenario of a large superfluid cloud eclipsing the Sun and its potential effects on light perception during the eclipse. Participants explore the implications of such an event, including questions about the nature of superfluids and the travel time of photons from the Sun's center to its surface.

Discussion Character

  • Exploratory
  • Debate/contested
  • Conceptual clarification

Main Points Raised

  • One participant imagines a superfluid cloud the size of the Moon eclipsing the Sun and questions whether this would result in a "night sun" effect during the eclipse.
  • Another participant challenges the existence of superfluids and requests scientific evidence, emphasizing the need to stay within known scientific understanding.
  • There is a discussion about the estimated photon travel time from the center of the Sun to its surface, with one participant suggesting it is about 100,000 years.
  • Some participants express uncertainty about the terminology used, particularly regarding the word "propagate" in relation to photon movement through the Sun's interior.
  • One participant asserts that superfluids do not affect light in any special ways, while another questions the fairness of describing the photon travel time as a simple propagation time due to the complex processes involved.

Areas of Agreement / Disagreement

Participants do not reach a consensus on the nature of superfluids or their effects on light. There are competing views regarding the implications of the hypothetical scenario and the understanding of photon travel time within the Sun.

Contextual Notes

Participants express varying levels of familiarity with the concept of superfluids and the scientific principles involved, leading to some confusion over terminology and assumptions about photon behavior.

Juanma
Messages
3
Reaction score
0
Imagine a big superfluid cloud the size of the Moon, at the same distance of the Moon in front of the Sun. A total eclipse of 7 minutes.
What would happen with the light coming from the sun during these 7 minutes?
Would we see a "night sun"?

Another question.
"Estimates of the photon travel time range between 10,000 and 170,000 years"
Could the center of the sun be in a superfluid state? Cold?
 
Physics news on Phys.org
and what scientific evidence to you base the existence of some superfluid ?

Please try and keep within known scientific understanding,

Estimates of the photon travel time range between 10,000 and 170,000 years"

from where to where ?

it does take light 150,000 - 170,000 to get to us from with the Large or Small Magellanic Clouds ... ie. they are ~ 160,000 light years from us

Dave
 
davenn said:
from where to where ?

I think he's talking about the time for a photon to propagate from the center of the sun to the outside, which I believe is normally taken as about 100,000 years.
 
davenn said:
and what scientific evidence to you base the existence of some superfluid ?

Please try and keep within known scientific understanding,

Superfluid is a state of matter. I just said "imagine" because I´m curious about the effect that we will perceive.


davenn said:
from where to where ?

From the center of the sun to the outside.
 
Juanma said:
... I just said "imagine" because I´m curious about the effect that we will perceive.
.

That's a lot like asking "If unicorns existed, would their horns be long or short?" Not really the kind of thing this forum is big on. We're more into discussion of established science.
 
Superfluids don't affect light in any special ways that I know of.

phinds said:
I think he's talking about the time for a photon to propagate from the center of the sun to the outside, which I believe is normally taken as about 100,000 years.
Considering how many times that energy is absorbed, re-emitted, absorbed again, transferred in collisions, carried by convection, and so on, do you really think it's fair to say that it's time it takes a photon to propagate?
 
K^2 said:
Considering how many times that energy is absorbed, re-emitted, absorbed again, transferred in collisions, carried by convection, and so on, do you really think it's fair to say that it's time it takes a photon to propagate?

I am just repeating what I have read about this. propagate may be a poor choice of words for the process, but I don't know a better one. I certainly do not mean that I think a single specific photon move from inside to outside, taking 100,000 years.
 

Similar threads

Replies
17
Views
4K
  • · Replies 7 ·
Replies
7
Views
4K
  • · Replies 1 ·
Replies
1
Views
5K
  • · Replies 7 ·
Replies
7
Views
3K
  • · Replies 6 ·
Replies
6
Views
3K
  • · Replies 19 ·
Replies
19
Views
4K
  • · Replies 21 ·
Replies
21
Views
6K
  • · Replies 3 ·
Replies
3
Views
2K
Replies
8
Views
5K
  • · Replies 8 ·
Replies
8
Views
40K