Pole star | Wikipedia audio article
Channel: wikipedia tts
Date: 2019-06-23

This is an audio version of the Wikipedia Article:
https://en.wikipedia.org/wiki/Pole_star


00:00:44 1 History
00:05:45 2 Precession of the equinoxes
00:13:07 3 Southern pole star (South Star)
00:16:17 4 Other planets
00:18:52 5 See also



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Speaking Rate: 0.7481454946663136
Voice name: en-US-Wavenet-B


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SUMMARY
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A pole star  or polar star is a star, preferably bright, closely aligned to the axis of rotation of an astronomical object.  
Currently, Earth's pole stars are Polaris (Alpha Ursae Minoris), a magnitude 2 star aligned approximately with its northern axis, and a pre-eminent star in celestial navigation, and Polaris Australis (Sigma Octantis), a much dimmer star. A couple thousand years ago, Kochab and Pherkad were twin northern pole stars, though neither was as close to the pole as Polaris is now.