Does the ISS appear to wobble when viewed with the naked eye, and if so, why?
I'm in Melbourne, Australia, and a couple of times recently when I've gone out to watch the ISS flyover, it appeared to have a very visible 'wobble'. Last night in particular, the ISS flew roughly 90 degrees above me, and it had this very pronounced wobble to it. I've had other people in Melbourne tell me they've seen the same thing, though a quick google only showed up one result:
https://www.quora.com/Why-would-the-ISS-appear-to-be-wobbling-when-viewed-with-the-naked-eye
Is this as the answerer there says, a result of temperate fluctations? Last night there also happened to be a plane flying high in the atmosphere as the ISS went past, and the airplane didn't have any visible wobble.
>>8477791
Seeing as how the ISS is much further up than the plane and thus the light from the ISS has to pass through a lot more atmosphere, that's probably the wobble your describing.
The whole reason we put a telescope is orbit was to eliminate artifacts caused by the atmosphere.
>>8477802
Thanks. Is there a reason, though, why the 'wobble' seems significantly more pronounced that the degree to which stars 'twinkle', or am I imagining this?
it is impossible to see the ISS if its going past mach speed over the earth.
sage
>>8477810
Probably your brain being confused by seeing the normal visual artefacts of the atmosphere combined with the fairly quick clip the ISS moves at, and the resulting visual effect is a wobble.
>>8477791
it's an effect of atmospheric turbulance and thermals.
IT's basically the same effect as the "Desert Mirage" only in a different place, over a different volume of air.
Ground based telescopes have been coping with the problem of looking through 200 some kilometers of air for decades now, you can see the effect if you look at the stars through a telescope, they appear to wobble as well.
>>8477810
>>8478365
Pulling this out of my ass, but it could be because the ISS is actually passing over the atmosphere. The stars twinkle because of temperature fluctuations and these fluctuations are caused by the movement of air. The stars are stationary, while the ISS is moving, so it seems like the fluctuations would be more pronounced
I can't say I've seen it wobble, but it depends on multiple factors.
The first is whether or not you've been sticking your dick in a dead elephant's trunk
>>8478356
Wew lad