Evidence that the Earth rotates in Space

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SUMMARY

The Foucault pendulum serves as definitive evidence of Earth's rotation, demonstrating that the plane of oscillation shifts due to the Earth's movement. Observations such as the apparent motion of stars and parallax further support this conclusion. Calculating the pendulum's revolution time based on latitude provides additional insights, particularly when comparing locations like the North Pole and the equator. Time-lapse images of star fields from different poles illustrate the rotation of the Earth against a stationary star field.

PREREQUISITES
  • Understanding of the Foucault pendulum and its mechanics
  • Basic knowledge of celestial motion and parallax
  • Familiarity with observational astronomy techniques
  • Concept of rotational dynamics and reference frames
NEXT STEPS
  • Calculate the period of a Foucault pendulum at various latitudes
  • Research time-lapse photography techniques for celestial observations
  • Explore the implications of parallax in astronomy
  • Investigate the historical context of space shuttle launches related to Earth's rotation
USEFUL FOR

Astronomy students, physics educators, and anyone interested in understanding the evidence for Earth's rotation through practical experiments and observational techniques.

IvanDkiwi
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Homework Statement
Hello,
I have a school project where i must explain and proove the rotation of the earth and i was wondering if the Foucault pendulum experience was an evidence that earth does rotate on itself.
Relevant Equations
Foucault pendulum
I was wondering if the Foucault pendulum experience was an evidence that earth does rotate on itself.
 
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Of course. The pendulum's plane of oscillation wouldn't rotate if it wasn't on a rotating object. It is strong evidence that the Earth is rotating.
 
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Apparent motion of certain stars, parallax - motion around the sun
 
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IvanDkiwi said:
Homework Statement: Hello,
I have a school project where i must explain and proove the rotation of the earth and i was wondering if the Foucault pendulum experience was an evidence that earth does rotate on itself.
Relevant Equations: Foucault pendulum

I was wondering if the Foucault pendulum experience was an evidence that earth does rotate on itself.

Foucault pendulum is good evidence. It might be interesting to try to do the calculation of how long a pendulum will take to do one revolution as a function of latitude. For example, if you had one at the north pole, at 30 degrees north, or at the equator, what would you see? Then find nearby museum with a big one and see if your calculation matches.
 
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malawi_glenn said:
Apparent motion of certain stars, parallax - motion around the sun
Welcome to PF, @IvanDkiwi :smile:

Just to add to Malawi's idea above, you could find time-lapse images of the stars when looking vertically from the North and South Poles. With such sequential images, you could see that the star fields rotate in different directions at the two poles.

And what other observation(s) would you need to make to prove that it's the Earth that rotates against a mostly-stationary star field, instead of the giant field of stars rotating around Earth? :wink:

1685460638667.png

https://www.noctilucents.com/blog/the-circling-stars
 
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Another piece of evidence, why did usa launch space shuttles in florida, and russia in kazakstan? (Closer to equator, more tangential speed)
 

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