Comparing Angular Rates of Star Rotation at Different Latitudes and Longitudes

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SUMMARY

The discussion clarifies that the Earth's rotational velocity at the Equator is 1,674.4 km/h (465.1 m/s), which corresponds to the angular rate of star rotation at that latitude. It emphasizes that while stars near the poles appear to move slower, their angular velocity remains consistent at approximately 15 degrees per hour, similar to that at the Equator. The comparison of linear rates is misleading, as it is the angular rate that is relevant for understanding star movement across different latitudes.

PREREQUISITES
  • Understanding of Earth's rotational dynamics
  • Familiarity with angular velocity concepts
  • Basic knowledge of celestial navigation
  • Awareness of the effects of precession on star visibility
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  • Explore the effects of precession on star positions
  • Learn about celestial navigation techniques
  • Investigate the differences between linear and angular motion
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Astronomy enthusiasts, educators in physics, students studying celestial mechanics, and anyone interested in understanding star movement relative to Earth's rotation.

Philosophaie
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The Earth's rotational velocity at the Equator is 1,674.4 km/h or 465.1 m/s. The stars at the equator rotate at that same rate taking in account Precession at that particular time of the year and the longitude & latitude they are viewed from. Do the stars at the poles rotate faster then at the equator also depending the longitude & latitude they are viewed from?
 
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No. Another way of looking at it by imagining the sky is rotating around the Earth instead. The stars near the poles move much slower in apparent velocity than the ones near the equator do.
 
Philosophaie said:
The Earth's rotational velocity at the Equator is 1,674.4 km/h or 465.1 m/s. The stars at the equator rotate at that same rate

No, be careful. It makes no sense to compare the linear rates (the stars don't move at 1674 km/h). It's the angular rate (of about 15 degrees/hr) that is the same.
 

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