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Physics, Astronomy & Cosmology / Re: Discuss: Where Does the Solar System End?
« on: 30/12/2014 05:29:51 »
If it orbits the sun the it is part of the solar system.
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quote:
Originally posted by science_guy
I see your standpoint, And I get what you are saying, but it is not completely right. God and Science go hand in hand, because God created science (scientific method is described in the bible), and God cannot lie, What we find In science cannot, in fact, be a lie. If you do have any questions about this subject, or any other pertaining to God and/or the universe, try going to http://www.reasons.org. The site is run by Hugh Ross, Ph.D. All of the arguments I used on this topic I learned personaly from him._________________________________________________________________________________________
I would engage you in a battle of wits, but it is against my moral code to attack the unarmed.
quote:
Originally posted by bostjan
Sorry, that link takes me to something about the Mars mission, and from what I understand, Epsilon Andromedae is a GVIII giant some 170ish lightyears away (more than 50 parsecs).
?
quote:
Originally posted by bostjan
Sorry, that link takes me to something about the Mars mission, and from what I understand, Epsilon Andromedae is a GVIII giant some 170ish lightyears away (more than 50 parsecs).
?
quote:
Originally posted by Razak
What I want to know:
1. If there are other parallel universes than were they all created from the same big bang or were there different big bang for different universe?
RazaK
quote:
Originally posted by simeonie
I am wondering though..... you probably could move faster than the speed of light but whatever is moving that fast you wouldn't be able to see because the light wouldn't reflect off it because it couldn't keep up. Plus I really doubt we will be able to go the speed of light.... EVER. Also does anybody know what "warp speed" is from Star Treck? Is that supposed to be the speed of light or something?
Simon
Trust me I am a doctor!
quote:
Originally posted by Mjhavok
I think the prominence of women in science is just recently got better. What about Rosalind Franklin? Her work lead to the double helix model by Watson & Crick but she gets nowhere near the amount of recognition they do.
-Steven
quote:
Originally posted by Mad Mark
I once posted a topic about everything expanding in scale including us, but because are measuring stick expanded aswell there would be no reference point to say if this is happening.
Tomorrow lies outside our universe without it there would be no tomorrow.
quote:
Originally posted by Nieuwenhovequote:
Originally posted by Radrookquote:
Originally posted by Nieuwenhovequote:
Originally posted by Radrookquote:
Originally posted by Nieuwenhovequote:
Originally posted by Radrook
The expansion is universal but it does not affect all space equally. That's because there are areas where gravity predominates and cancels the otherwise local expansion.
Yes, I know this argument. The fact that gravity predominates does not in itself justify why the expansion of space would STOP COMPLETELY in such a region. How does space "know" in which regions it should expand and in which regions it shouldn't ?
Scientists say that the expansion merely reacts to the density of matter in those regions by being unable to create distance between objects in those regions. How would that reaction be any different from the reaction of everything else to the force of gravity?
Suppose the expansion of space is occurring intrinsically everywhere including within our solar system. For the local gravity between say earth and sun to suppress this expansion, the effect of gravity would be to contract the space between earth and sun at exactly the right rate such that the net expansion would be zero. However, I do not know that a "space contraction effect by gravity" is predicted or included by general relativity. And if this is not the case, we are back at the original question ; what prevents the expansion of space within our solar system ?
That would require us to assume that universal expansion is powerful enough to make local gravitational predominance waver and readjust.
But let us suppose that gravity keeps these areas stable without any need to contract or readjust. Then it would be similar to a brick wall which maintains its position and shape though air expands and contracts around it. Is that an acceptable supposition as well? If not-why not?
I know what you mean but this is not really satisfying: Suppose indeed that gravity stabilises space, then the question still remains why and how. Is the strength of the field the determining factor ? I would not think so because there are also strong gravitational fields outside a galaxy where space is expanding. So, where should one draw the line ? There seems to be missing a criterium (or unknown property) to tell where space should be stable and where not.
quote:
Originally posted by Nieuwenhovequote:
Originally posted by Radrookquote:
Originally posted by Nieuwenhovequote:
Originally posted by Radrook
The expansion is universal but it does not affect all space equally. That's because there are areas where gravity predominates and cancels the otherwise local expansion.
Yes, I know this argument. The fact that gravity predominates does not in itself justify why the expansion of space would STOP COMPLETELY in such a region. How does space "know" in which regions it should expand and in which regions it shouldn't ?
Scientists say that the expansion merely reacts to the density of matter in those regions by being unable to create distance between objects in those regions. How would that reaction be any different from the reaction of everything else to the force of gravity?
Suppose the expansion of space is occurring intrinsically everywhere including within our solar system. For the local gravity between say earth and sun to suppress this expansion, the effect of gravity would be to contract the space between earth and sun at exactly the right rate such that the net expansion would be zero. However, I do not know that a "space contraction effect by gravity" is predicted or included by general relativity. And if this is not the case, we are back at the original question ; what prevents the expansion of space within our solar system ?