21. This changes the location of the equatorial bulge of the Earth and further affects the geoid, or global potential field. 22. This theory never won scientific adherents since the earth's equatorial bulge makes the spin too stable for any sudden change. 23. Actually it'll be slightly less than that due to the pull of the equatorial bulge itself, but that's harder to compute. 24. The resulting equatorial bulge is about 20 % larger than the polar radius, giving the star the shape of an oblate spheroid. 25. It is due to shorter-period fluctuations in the strength of the torque exerted on Earth's equatorial bulge by the sun, moon, and planets. 26. [[ Image : Equatorial bulge model . png | frame | right | Fixed to the vertical rod is a spring metal band. 27. The Earth's equatorial bulge causes the orbital right ascension of the ascending node ( RAAN ) to prograde ( inclination < 90?) orbit. 28. This is causing an equatorial bulge , giving the star an oblate figure with a 24 % larger radius at the equator than at the poles. 29. Gamma Cassiopeiae is a rapidly spinning star with a projected rotational velocity of 472 km s " 1, giving it a pronounced equatorial bulge . 30. It has a projected rotational velocity of 255 km / s, resulting in an equatorial bulge with a radius 13 % larger than the polar radius.
