Altair is a oblate; its equatorial diameter is over 20 percent greater than its polar diameter.
2.
The value of 1.00106 British inches is calculated as 1 / 500, 000, 000 of the Earth's polar diameter.
3.
:Note that the expression for the Earth's relative polar diameter has nothing whatsoever do with any particular choice of coordinate system.
4.
As a consequence, the polar diameter of Earth increases, and the equatorial diameter decreases ( Earths volume must remain the same ).
5.
:The Earth only has one geometric property pertaining to its polar diameter, but that geometric property is a 4-vector, not a scalar.
6.
In complete analogy to the Earth's relative speed, the Earth's relative polar diameter as a function of an arbitrary 4-velocity V is
7.
The Earth is not a perfect sphere but an oblate spheroid, with an equatorial diameter about 43 kilometers larger than its polar diameter.
8.
Now it is measured to be 4000 miles, while the polar diameter has returned to its proper length of just under 8000 miles.
9.
The giant planet spins so fast, making a complete rotation in fewer than 11 hours, that its polar diameter is a full 10percent smaller than its equatorial diameter.
10.
The giant planet spins so fast, making a complete rotation in fewer than 11 hours, that its polar diameter is a full 10 percent smaller than its equatorial diameter.
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