TECO Energy's main subsidiary, Tampa Electric, is planning to expand the Polk Power Station to serve future electricity needs. Plans call for converting the four natural gas-fired combustion turbines into a more efficient combined-cycle unit. If we get all the necessary approvals, the $700 million project is scheduled to be running by early 2017.
The circumference of the Earth is 24,902 miles (40,075.16 km). Over the poles it is more precisely 40,008 km or 24,860 statute miles. The actual unit of measure used by Eratosthenes was the stadion.
In the same century, Aristarchus computed the size and distance of the Moon from Earth, obtaining a value of about twenty times the radius of Earth for the distance. These figures were greatly improved by Ptolemy (90â168 AD): his values of a mean distance of 59 times Earth's radius and a diameter of 0.292 Earth diameters were close to the correct values of about 60 and 0.273 respectively.