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Originally posted by Juggernog
Havnt you guys hear that little song? The one that goes "Twinkle Twinkle Little Star"
How do you think it got its name?edit on 5-5-2012 by Juggernog because: (no reason given)
Originally posted by NotAnAspie
we can talk about this phenomenon all day but until someone can explain why it happens to one star but not the star right next to if it is an earthly atmospheric condition... we are still getting nowhere.
Originally posted by ArMaP
Originally posted by NotAnAspieere.
Originally posted by swan001
reply to post by NotAnAspie
How long did the strobing lasted??
Originally posted by NotAnAspie... but now I am being asked to give an example of a star that ISN'T twinkling and i must say, i just don't get. i don't understand what you are getting at. how is this going to help answer anyone's questions?
Now I understand that you are talking about stars blinking in different ways (or at least I suppose I understand it).
maybe i'm just not understanding you but yeah, most stars are twinkling to a degree and some more so than others by being close to the horizon and emitting more light, but to see a relatively small star going off like a Christmas tree and one of the same size or larger right next to it just twinkling a little and nowhere near as much color... well, that's the difference.
i mean are you being sarcastic and just making a point that most do twinkle some or are you genuinely trying to factor things out because i just can't feel you on this one.
what is it you are wanting from me exactly.
Scintillation or twinkling are generic terms for rapid variations in apparent brightness or color of a distant luminous object viewed through a medium, most commonly the atmosphere (atmospheric scintillation). If the object lies outside the Earth's atmosphere, as in the case of stars and planets, the phenomenon is termed astronomical scintillation; if the luminous source lies within the atmosphere, the phenomenon is termed terrestrial scintillation. As one of the three principal factors governing astronomical seeing, atmospheric scintillation is defined as variations in illuminance only, and so twinkling does not cause blurring of astronomical images. It is clearly established that almost all scintillation effects are caused by anomalous refraction caused by small-scale fluctuations in air density usually related to temperature gradients. Normal wind motion transporting such fluctuations across the observer's line of sight produces the irregular changes in intensity characteristic of scintillation. Scintillation effects are always much more pronounced near the horizon than near the zenith (straight up). Parcels of air with sizes of the order of only centimeters to decimeters are believed to produce most of the scintillatory irregularities in the atmosphere. Atmospheric scintillation is measured quantitatively using a scintillometer.
Originally posted by usmc0311
When stars and planets are lower on the horizon they tend to twinkle more and often seem to strobe different colors. Sirius is known for looking like a siren when it is lower. We have atmospheric disturbance to thank for this cool effect. As well as the angles being greater when it is lower on the horizon so you are not looking straight through if your understanding me.
The one your describing sounds like Sirius.edit on 16/3/12 by usmc0311 because: added content.
Originally posted by assspeaker
I always thought the varience of twinkle factor had to do worth gas clouds and debris between the observer and the star. Sure our atmosphere has an effect, and due to the different wavelengths of light from one star to another, it may make one seem to bounce through the warmer colors of the spectrum, while a closer brighter star may hold its 100,000 kelvin color better.
Seems perfectly normal and logical to me.