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Author Topic:   How do creationists explain stars?
cavediver
Member (Idle past 3672 days)
Posts: 4129
From: UK
Joined: 06-16-2005


Message 213 of 297 (328268)
07-02-2006 12:10 PM
Reply to: Message 211 by Hyroglyphx
07-02-2006 11:45 AM


Re: Q&A
was informed that our sun is estimated to be 24 trillion miles away
No, the Sun is 93 million miles away (averaged over the year, as our elliptic orbit continually changes the distance).
and that it takes 8 minutes for the suns' heat to reach the surface of the earth
I'd say light, not heat, as it is the light that carries the heat (in a real bastardisation of the terminology) but yes, 8 minutes.
So if the closest star is 24 trillion miles away
Ok, the Sun is 93 million light years away. The next closest star, Proxima Centauri, is 4.3 light years away. Speed of light is 186,000 miles per second (don't you just love these Imperial units!). So 4.3 x 365 x 24 x 60 x 60 x 186,000 = number of miles = 25 trillion miles. But this is 4.3 light YEARS away, not 8 light MINUTES !!
how far away are these other stars that it should take, say, 100,000,000 lightyears to reach us?
A light year is a distance remember, so you mean "100,000,000 years to reach us". 100 million light years is a long long way outside our Galaxy. Our sister galaxy, Andromeda, is only 2.2 million light years away. The stars we see at night are typically from 10s to 1000s of light years away, all contained within our own Galaxy. The Galaxy is rougly 100,000 light years across, but we can't see too far through it becasue of dust, although we can use infrared, radio and x-rays to see further.
Does any of this mean tht light did in fact travel in the past? Certainly not, however, we at leaset know that it is possible, proven undeniably by two separate teams.
No. Despite the popularisations of these experiments, they have NOTHING to do with "c" the true speed of light. The experiments are certainly interesting, and in the latter case extremely useful, but they have nothing to do with the speed of light. They deal with the speed of phases of light, which is a wholly different thing.
These studies lead a legitimate inquiry into how we percieve the parallax of starlight.
Not in the slightest, for the reasons mentioned above.

This message is a reply to:
 Message 211 by Hyroglyphx, posted 07-02-2006 11:45 AM Hyroglyphx has not replied

cavediver
Member (Idle past 3672 days)
Posts: 4129
From: UK
Joined: 06-16-2005


Message 219 of 297 (328401)
07-03-2006 3:26 AM
Reply to: Message 218 by johnfolton
07-03-2006 2:36 AM


Re: Q&A
Is the Bell phenomenom an example of faster than light communication
No, absolutely not
If the photon travels at the speed of light then is quantum entanglement communication happening at faster than light?
There is no communication in quantum entanglement. It is a phenomenon based purely upon the non-local nature of wavefunctions.
They make a barrier to photons (called a wave quide) yet information is recieved through the barrier. Has photons actually crossed over the barrier or is this another example suggestive of quantum entanglement (ftl) communication?
It is a phenomenon based purely upon the non-local nature of wavefunctions.
proved for the first time that quantum entanglement was a physical phenomenon with bona fide FTL implications.
Only in the minds of those not familiar with quantum mechanics.

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 Message 218 by johnfolton, posted 07-03-2006 2:36 AM johnfolton has not replied

cavediver
Member (Idle past 3672 days)
Posts: 4129
From: UK
Joined: 06-16-2005


Message 221 of 297 (328464)
07-03-2006 7:54 AM
Reply to: Message 220 by Percy
07-03-2006 7:29 AM


Re: Q&A
Cavediver's response provided the correct answers but little explanations
because...
it probably should be taken up in a different thread

This message is a reply to:
 Message 220 by Percy, posted 07-03-2006 7:29 AM Percy has not replied

cavediver
Member (Idle past 3672 days)
Posts: 4129
From: UK
Joined: 06-16-2005


Message 241 of 297 (387710)
03-02-2007 5:31 AM
Reply to: Message 240 by kinetic2080
03-02-2007 4:52 AM


Hi Kinetic, welcome to EvC
according to Einstein space bends around planetary bodies. Does this influence parallax distance calculations
Not practically. If you were daft enough to take the position of star by viewing along a line of sight that grazed the Sun, then you would get an error because of the warped space-time around the Sun.
The observed position of galaxies is often distorted by intervening galaxies (look up gravitational lensing), but unless your parallax base-line is the diameter of our Galaxy or bigger, the error is going to be the same for both positon measurements, so shouldn't affect things too much.
How accurate can you measure distance?
We used to joke that for in-Galaxy distances, within a factor of 2 was good, and for anything else, getting the right order of magnitude was an achievement! Even back then, it was never that bad. Now things are substantially better. I'm sure you could look up some figures, but I guess in-Galaxy distances will be 1-10% error depending on distance, direction and intervening material; local group around 10%, getting steadily worse the further we go out. Much depends on our "standard candles" and there has been some dispute over their reliability recently, so maybe incresaing error bounds to 30%? I'm guessing here. As our ability to use parallax grows (have a baseline from here to Neptune's orbit, say) our accuracy will incraese dramatically.
Edited by cavediver, : No reason given.

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 Message 240 by kinetic2080, posted 03-02-2007 4:52 AM kinetic2080 has not replied

cavediver
Member (Idle past 3672 days)
Posts: 4129
From: UK
Joined: 06-16-2005


Message 278 of 297 (393647)
04-06-2007 5:06 AM
Reply to: Message 275 by Reserve
04-05-2007 8:59 PM


Re: Distance to stars and the speed of light.
My question to you is, what observation?
From what I read at:
http://www.ldolphin.org/stars.html
quote:
...Dr. Ross referred me to a book by Cox and Giuli, a massive, two-volume work on astrophysics published in 1968, implying that the information therein would refute my objections. After reading the relevant portions of their book, I found that they did not support his statements at all and did support my objections...
you think that quotes from 1968 are relevant??? Do you not think that in THIRTY NINE years, astrophysical research may have moved on a little? That obseravtions may have improved, just a little? Ever heard of the HST? It's this little telescope we have in orbit that has improved observations relevant to this study by, ooh say, a THOUSAND-FOLD!!!!
Do you really think that stellar astrophysicists have sat on their arses for the past 39 years??? What do you think they've been doing for nearly half a century? Drinking their way through their grants? (well, in my experience there's a fair bit of truth there )
Edited by cavediver, : trimming excess sarcasm

This message is a reply to:
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