Sagittarius A-Star's latest activity
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Sagittarius A-Star replied to the thread Undergrad Can a Gyroscope in a Satellite Detect Orbit?.They try to avoid the use of thrusters and use control moment gyroscopes most of the time, to not disturbe micro-gravity experiments... -
Sagittarius A-Star reacted to pervect's post in the thread Undergrad Can a Gyroscope in a Satellite Detect Orbit? with
Like.
As far as I know, this is just due to the ISS being deliberately locked to a constant orientation relative to the Earth, for practical... -
Sagittarius A-Star replied to the thread Undergrad Can a Gyroscope in a Satellite Detect Orbit?.The gyroscope in the video is spinning about it's axis (even while it's housing is not spinning), but it is difficult to see. How this...
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Sagittarius A-Star replied to the thread Undergrad Can a Gyroscope in a Satellite Detect Orbit?.It's the ISS, which rotated, not the gyroscope axis: Source...
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Sagittarius A-Star replied to the thread Undergrad Is this another "paradox" or a veritasium mistake?.In theses notes is also mentioned, that Johann Georg von Soldner calculated the gravitational deflection of light as it passes the sun...
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Sagittarius A-Star reacted to PeterDonis's post in the thread Undergrad Is this another "paradox" or a veritasium mistake? with Like.
To be more precise: the global bending of light when passing close by a massive object, i.e., the angle between its incoming path at...
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Sagittarius A-Star reacted to pervect's post in the thread Undergrad Is this another "paradox" or a veritasium mistake? with Like.
It would be bent twice as much by a mass. But I don't think not on an elevator. I don't have a reference for this statement, but I...
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Sagittarius A-Star reacted to Greg Bernhardt's post in the thread Announcement RIP Vanadium 50 with
Sad.
I have some solemn news to report. Many in the community had been wondering where the prolific @Vanadium 50 has been. V50 hasn't posted... -
Sagittarius A-Star reacted to PeroK's post in the thread Undergrad The Einstein Clock aka Light Clock with Like.
PS note that it is the speed of light that is independent of the motion of the source. Not the velocity of light, which is a vector and...
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Sagittarius A-Star replied to the thread Undergrad The Einstein Clock aka Light Clock.The explanation of aberration in the light-clock scenario does not only work with classical particles, but also with EM waves. The...
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Sagittarius A-Star replied to the thread Undergrad The Einstein Clock aka Light Clock.Do you mean the case ##v=0##? You get ##2\arccos{} 0= \pi##, but not ##2\pi##. It seems that you want to describe the headlight effect...
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I think the train actually distorts in its original rest frame, rather than tilting. Although it's a funny kind of stress-free...
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Sagittarius A-Star replied to the thread High School Train Fall Paradox.In the restframe of the train, the bridge-length maybe even smaller than the train-length due to length contraction, if the bridge moves...