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Roblin
Sweden948 Posts
On January 21 2011 17:50 Empyrean wrote: At least try to read some of the thread before posting :/ Quite simply, nothing of the sort will ever happen. sorry, just playing the "what if" game | ||
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Corvette
United States433 Posts
On January 21 2011 17:19 Empyrean wrote: None. We're going to experience an increased neutrino flux which is going to have virtually no physical effect on Earth. And for any star to be able to affect global temperatures is an absolutely ridiculous notion. any star? you mean like, it would be ridiculous for the one that i see out my window at noon to affect the global temperature of this planet? i know people are saying that you are some sort of genius/wizard, but for stating such a simple fact your logic seems to be flawed :/ in the instance that you still dont understand, the sun is a star that affects the global temperature | ||
Empyrean
16950 Posts
On January 21 2011 17:58 Corvette wrote: any star? you mean like, it would be ridiculous for the one that i see out my window at noon to affect the global temperature of this planet? i know people are saying that you are some sort of genius/wizard, but for stating such a simple fact your logic seems to be flawed :/ in the instance that you still dont understand, the sun is a star that affects the global temperature Sorry, I meant any star except for our sun. EDIT: Don't be a douchebag. | ||
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Haemonculus
United States6980 Posts
On January 21 2011 17:58 Corvette wrote: any star? you mean like, it would be ridiculous for the one that i see out my window at noon to affect the global temperature of this planet? i know people are saying that you are some sort of genius/wizard, but for stating such a simple fact your logic seems to be flawed :/ in the instance that you still dont understand, the sun is a star that affects the global temperature Should be pretty obvious he meant any star aside from our own... edit: yup, see above, lol | ||
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SpiritoftheTunA
United States20903 Posts
On January 21 2011 17:54 Roblin wrote: essentially meaning: what we see is happening 600 lightyears away actually happened 600 years ago, it just took the light 600 years to come here and tell us. so when we say "that star 600 light years away will go supernova in about 2 years" that actually means "that star 600 light years away went supernova ≈598 years ago, but we will not be affected by it for another 2 years since the effects wont reach us until then" yes but in your hypothetical, we can't know that it went away "598 years ago" because the necessary information travels towards us at light speed, thus information of the explosion = the explosion itself and nothing prior | ||
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xlep
Germany274 Posts
On January 21 2011 17:54 Roblin wrote: essentially meaning: what we see is happening 600 lightyears away actually happened 600 years ago, it just took the light 600 years to come here and tell us. so when we say "that star 600 light years away will go supernova in about 2 years" that actually means "that star 600 light years away went supernova ≈598 years ago, but we will not be affected by it for another 2 years since the effects wont reach us until then" Exactly this was the first thought I had when reading the article. It is (would be) cool to experience something like that, even if we could only see a star light up for a while and then just die... I love the idea of experiencing something that happened hundreds or thousands of years ago ^^ On January 21 2011 17:54 hifriend wrote: I wish there were multiple Empyrean's to go around for all internet discussion venues related to this type of sensationalist pseudo-science reporting. that would be awesome ^^ | ||
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Maenander
Germany4923 Posts
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SwiftSpear
Canada355 Posts
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Advocado
Denmark994 Posts
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SwiftSpear
Canada355 Posts
Acctually, that's pretty darn bright. Although still not "a second day" bright. | ||
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Roblin
Sweden948 Posts
On January 21 2011 17:58 Corvette wrote: any star? you mean like, it would be ridiculous for the one that i see out my window at noon to affect the global temperature of this planet? i know people are saying that you are some sort of genius/wizard, but for stating such a simple fact your logic seems to be flawed :/ in the instance that you still dont understand, the sun is a star that affects the global temperature I believe he meant other than the sun, and just for the sake of speculation, im gonna do some math on how light intensive a star would be if it was as luminous as R136a1, the most luminuos star we know of (I didnt search much, could be wrong) with an absolute magnitude of -12.5, for those that wont bother checking up what that means, its ≈100.000.000.000.000.000 (a hundred million billion!) times more luminous as the sun, and lets check how much it would affect the tempreture on earth (compared to the sun) if it was on the same distance as our closest star (other than the sun) which is 4.2 light years luminosity dissipates at a rate of the distance squared (or 1/(distance^2)), for example, if you have a flash light and put it on distance x from a flat surface, it will shed its light on a certain area, lets define this as a. if you put it on distance 2*x, then the light will spread twice as far in both "height" and "width", meaning it will illuminate an area that is a^2, meaning that every cm^2 is illuminated by less light, see the logic? we have a very nifty little measure of length, its called astronomical units, and its the distance from the sun to the earth, nice for moments like this eh? one light year is 63240 astronomical units (picture that in your mind, our closest star is 63240 * 4.2 = 265608 times farther away from us as the sun, and the sun is plenty far away already) so if the amount of light (or photons or heat if you will) that we receive today from the sun is L (as in light) then that theoretical star would give us ((10^17L)/(265608)^2) or rounded ≈1417482 so when we have some facts on the table, if you were to put the strongest star in our known universe, and put it were our closest star is, then yes, our temperature would increase quite a bit, by a few thousand degrees as a matter of fact. but when we look at actual reality, the brightest star on the nightsky is Sirius, in the lion, which is ≈(1 / 10.000.000.000.000.000.000.000.000) (one ten-million-billion-billionth!) of the suns appearent magnitude, it seems extremely unlikely that any star will ever affect our temperature in any significant way other than the sun during the closest 100 generations or so. | ||
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Angra
United States2652 Posts
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EchoZ
Japan5041 Posts
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Roblin
Sweden948 Posts
On January 21 2011 19:09 EchoZ wrote: Astrology is just so fascinating, don't you agree? sorry, cant resist. "Astrology is a set of systems, traditions, and beliefs which hold that the relative positions of celestial bodies (the Sun, Moon, and planets) and related details can provide information about personality, human affairs and other "earthly" matters." - wikipedia I believe you are either trolling or meant astronomy, not astrology the difference is one is science, the other hearsay. | ||
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TheKanAry
United States149 Posts
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Boonbag
France3318 Posts
On January 21 2011 18:03 xlep wrote: Exactly this was the first thought I had when reading the article. It is (would be) cool to experience something like that, even if we could only see a star light up for a while and then just die... I love the idea of experiencing something that happened hundreds or thousands of years ago ^^ that would be awesome ^^ He'd use Sacrifice of orm and blow up every one thread he's fighting in. | ||
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craz3d
Bulgaria856 Posts
On January 21 2011 17:37 Icx wrote: can you clarify this for me: Is the observation of betelgeuze losing mass actually an observation off the star itself or basicly from the light that we get from it (I have no idea how they actually measure those things). So let's say this happened a bit more then 600 years ago, it's actually possible (altough we would have to be incredibly lucky) to see this in 2012 or later. Or is this an observation of the star itself, and even if this happens in 2012 it will still take 600+ years for that light to reach earth? Well I don't know what other type of observations there could be. I presume that observations are made using a telescope. What we see through a telescope is light. So yea, at the moment that you wrote that post, it may have gone supernova already. When this information will reach Earth, that's hard to say. | ||
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meegrean
Thailand7699 Posts
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pfods
United States895 Posts
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SpiritoftheTunA
United States20903 Posts
On January 21 2011 19:59 pfods wrote: 1300 light years from earth means you won't know about it until 1300 years from when it happens, So it is completely irrelevant to us. uh... that's not how it works either... what we see in the sky right now is the star 1300 years ago in that case. if it happened to explode 1300 years ago and we're exactly 1301 light years way, we'd find out about it a year from now. no way to tell before the time that we find out either. so its not like 1. star explodes, we find out 2. 1300 years later we see the result of what we found out already 1300 years prior ^ WRONG its actually just 1. we see the star explode, we know that the event happened however many years ago = how many lightyears far away it is so if you're arguing that it's irrelevant to us because our predictions are basing this on the "current" state of the star, that's not true because the "current" state of the star to us is how it was 1300 years ago at its point in space. though really its all semantics because there is no such thing as true simultaneity anyhow, its all relative to where you are and how fast you're going edit: in the case that "it" in your sentence is referring to the distance from earth, then yeah i think i might get what you're trying to say but you worded it horribly lol | ||
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