How fast are we really moving?

  • Context: Undergrad 
  • Thread starter Thread starter kenthedentman
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SUMMARY

The discussion centers on the complexities of speed in relation to Earth's rotation, its orbit around the sun, and the sun's movement within the Milky Way galaxy. The user expresses curiosity about the implications of these speeds on theoretical time travel, specifically questioning the possibility of exceeding light speed and returning to the original point of departure. The conversation highlights the need for a clearer understanding of relative motion and the nature of light speed in the context of the universe's structure.

PREREQUISITES
  • Understanding of basic astrophysics concepts, including Earth's rotation and orbital mechanics.
  • Familiarity with the theory of relativity and the speed of light as a cosmic speed limit.
  • Knowledge of the structure of the Milky Way galaxy and its motion within the universe.
  • Basic principles of theoretical physics related to time travel and spacetime.
NEXT STEPS
  • Research the implications of Einstein's theory of relativity on speed and time travel.
  • Explore the concept of light speed and its significance in astrophysics.
  • Investigate the structure and dynamics of the Milky Way galaxy.
  • Study theoretical models of time travel and their feasibility in modern physics.
USEFUL FOR

Astronomy enthusiasts, physics students, and anyone interested in the theoretical aspects of speed, time travel, and the universe's structure.

kenthedentman
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I have been wondering about speed. If we are sitting here on Earth rotating around our axis at approx 1000mph and orbiting the sun. And the sun is orbiting the Milky Way and the Milky Way is spiraling out from the center of the universe. How fast does that mean we are moving?

And of course being the inquisitive person that I am I wonder when we are talking about light speed are we meaning relative to a fixed object and if so which one? The center of the universe?

I guess the reason I am asking is because I am interested in theoretical time travel. I believe it is possible to if you can some how move past the speed of light and and then be able to instantly get back to the object you left from. I don't believe it is possible to comeback however. Unless there is some fundamental flaw in our understanding of time and light.

Anyway I am not a physicist I am just very interested in this kind of subject matter along with history. So if my questions are too basic forgive me.
 
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i found the question has been asked and answered. Should have searched first.
 

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