Spin & Frame of Reference: Detecting Motion in Space

In summary, a conversation discussed the possibility of using a toy gyroscope in space and how to determine its spinning direction without any reference points. It was suggested to use a ring interferometer, which rules out certain aether theories. The conversation also mentioned the potential use of the device to find direction in space, but it was clarified that it does not show the existence of aether.
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hsdrop
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If we put a toy gyroscope in space, like the ones we all played with as kids with the wheel on the inside of a wire frame, and had nothing to reference it to. (stars, planets, dust, exc.) How could you tell if the inside was spinning or the wire frame??
 
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hsdrop said:
How could you tell if the inside was spinning or the wire frame??
Use a ring interferometer.
 
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Wow, sorry for my ignorance. I feel silly now. lol I had no idea that something like that existed, thank you for sharing. After reading up just a little on the device and how it works. Does the device show that there is a kind of aether that everything travels throw and could possibly be used to find direction in space? Not the cardinal directions but in degrees of a path.
 
  • #4
hsdrop said:
Does the device show that there is a kind of aether that everything travels throw
No. The device in fact rules out a class of aether theories involving "aether dragging". Basically, Michelson interferometers rule out rigid aether theories and ring interferometers rule out dragged aether theories. Only Lorentz aether remains, which is an aether that is indistinguishable from no aether.
 
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1. What is spin and frame of reference in relation to detecting motion in space?

Spin refers to the intrinsic angular momentum of a particle, while frame of reference is the coordinate system used to measure the position and motion of an object. In space, detecting motion involves understanding how spin and frame of reference can affect our measurements.

2. How do we detect motion in space using spin and frame of reference?

One method is through the use of gyroscopes, which utilize the principle of conservation of angular momentum to detect changes in orientation and motion. By tracking changes in the spin of the gyroscope within a known frame of reference, we can determine the motion of the spacecraft.

3. What challenges do scientists face when detecting motion in space?

One challenge is the lack of a fixed frame of reference in space, making it difficult to accurately measure motion. Another challenge is the effects of relativity, where the relative motion between two objects can alter their perception of time and space.

4. How is the detection of motion in space important for space missions?

Knowing the precise motion and orientation of spacecraft is crucial for navigation and communication. It also allows for the accurate planning and execution of maneuvers, such as docking with other spacecraft or entering and exiting orbit.

5. Are there any potential applications of spin and frame of reference in other fields?

Yes, spin and frame of reference are essential concepts in fields such as physics, engineering, and navigation. They are also used in the development of technologies such as GPS and inertial navigation systems, which rely on the principles of spin and frame of reference to accurately measure motion and position.

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